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Journal articles on the topic 'High critical temperature superconductor'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

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1

Zhang, Ling-Yun, Jia-Tih Lin, Bo-Zang Li, and Fu-Cho Pu. "Thermal Properties of High Temperature Superconductors: Soliton Statistics Approach." Modern Physics Letters B 11, no. 04 (1997): 149–54. http://dx.doi.org/10.1142/s0217984997000207.

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We develop a soliton statistics approach to discuss the lattice effect of high temperature superconductor in the Davydov model on the basis of the bisoliton idea. We prove that lattice displacement in the Davydov model satisfies ϕ4 field form. Critical temperature of high temperature superconductor is studied from statistics of lattice kink. We have shown that the lattice effect is pronounced for thermal properties of high temperature superconductors. Comparision between theoretical and experimental results are good agreement for LaSrCuO and YBaCuO superconductor materials.

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2

Jin, C.-Q., S.-C. Li, J.-L. Zhu, F.-Y. Li, Z.-X. Liu, and R.-C. Yu. "High Critical Current Density of a MgB2 Bulk Superconductor High-pressure Synthesized Directly from the Elements." Journal of Materials Research 17, no. 3 (2002): 525–27. http://dx.doi.org/10.1557/jmr.2002.0073.

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We report the property studies of a MgB2 superconductor with high critical current density. The MgB2 superconductor was readily fabricated through a direct high-pressure synthesis of the respective elements. The obtained high-density MgB2 undergoes a sharp superconducting transition at 39 K. The bulk critical current density (Jc) of the sample was calculated on the basis of Bean's critical state model, and rather high critical current densities over a wide temperature range were obtained in comparison with the ambient prepared samples. The results highlight that high-pressure sintering would b

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3

Miller, John H. "The journey of high-temperature superconductors: From discovery to today." Open Access Government 45, no. 1 (2025): 224–25. https://doi.org/10.56367/oag-045-11330.

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The journey of high-temperature superconductors: From discovery to today John H. Miller, Jr., Professor of Physics at the University of Houston, discusses progress in high-temperature superconductors and its applications. The lab of H. Kamerlingh Onnes, the first group to liquefy helium, discovered superconductivity in 1911. Several metals were found to undergo a phase transition to a new state characterized by the loss of resistance below a critical temperature, or Tc. The Meissner effect, the expulsion of magnetic flux, was discovered in 1933. In 1957, John Bardeen, Leon Cooper, and J. Rober

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4

M.E., Emetere, Awojoyogbe O.B., Uno U.E., Isah K.U., Sanni E.S., and Akinyemi M.L. "How Reliable is the Cuprates System to Recent Technology?" International Journal of Electrical and Computer Engineering (IJECE) 6, no. 4 (2016): 1534. http://dx.doi.org/10.11591/ijece.v6i4.10082.

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The emergence of cuprates as a high Tc superconductor gave high hopes in the discovery of a room temperature superconductor. It is almost three decades and the highest critical temperature attained on the cuprates is about 135K. A brief overview was conducted on the progress made so far on the cuprates. A mathematical approach was used to design a formula which could determine the experimental results of critical temperature of versed cuprates superconductors. The result of our findings shows that the possibility of attaining the experimental room temperature cuprates superconductor seems very

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5

M.E., Emetere, Awojoyogbe O.B., Uno U.E., Isah K.U., Sanni E.S., and Akinyemi M.L. "How Reliable is the Cuprates System to Recent Technology?" International Journal of Electrical and Computer Engineering (IJECE) 6, no. 4 (2016): 1534. http://dx.doi.org/10.11591/ijece.v6i4.pp1534-1540.

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The emergence of cuprates as a high Tc superconductor gave high hopes in the discovery of a room temperature superconductor. It is almost three decades and the highest critical temperature attained on the cuprates is about 135K. A brief overview was conducted on the progress made so far on the cuprates. A mathematical approach was used to design a formula which could determine the experimental results of critical temperature of versed cuprates superconductors. The result of our findings shows that the possibility of attaining the experimental room temperature cuprates superconductor seems very

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6

Bigansolli, Antonio Renato, Tessie Gouvêa da Cruz, Francisco Romário de Souza Machado, and Durval Rodrigues Jr. "Characterization of Bi2212 Superconductor Bulk Samples by Digital Image Processing." Advanced Materials Research 975 (July 2014): 128–33. http://dx.doi.org/10.4028/www.scientific.net/amr.975.128.

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The use of superconductors of high critical temperatures in applied superconductivity leads to higher operation temperatures and economy of cryogenic fluids. High temperature superconductor materials exhibits limited transport properties due to grain boundary weak-links and anisotropy on the critical currents. The texturing development in these superconductors decreases in an efficient way the number of high-angle grain boundaries, increasing the values of critical current densities (Jc). In this research the size grain distribution characterization of Bi2212 superconductor bulk samples heat t

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7

Гуламова, Д. Д., А. В. Каримов, Д. Г. Чигвинадзе та ін. "Исследование критической температуры T-=SUB=-c-=/SUB=- гомофазных сверхпроводников (Bi-=SUB=-1.7-=/SUB=-Pb-=SUB=-0.3-=/SUB=-Sr-=SUB=-2-=/SUB=-Ca-=SUB=-(n-1)-=/SUB=-Cu-=SUB=-n-=/SUB=- O-=SUB=-y-=/SUB=- (n=3, 4, 5) и вольт-амперных характеристик сэндвич-пар полупроводник InP-сверхпроводник Bi/Pb (2223, 2234, 2245)". Журнал технической физики 89, № 4 (2019): 583. http://dx.doi.org/10.21883/jtf.2019.04.47317.2269.

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AbstractThe electrophysical properties of semiconductor–superconductor sandwich pairs (InP–Bi/Pb 2223, 2234, 2245) are investigated, in which homophase superconductors based on bismuth cuprates with high reproducible critical temperatures of superconducting transition T _ c = 107–180 K are used. The advantage of melt solar technology for obtaining superconducting materials is demonstrated. The microstructure and phase composition of strongly anisotropic superconductors with nominal composition Bi_1.7Pb_0.3Sr_2Ca_( n _– 1)Cu_ n O_ y ( n = 3, 4, 5) are researched. A technique of experimental det

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8

Poluéktov, Yu M. "Critical temperature of a two-band superconductor with account for interband pairing." Soviet Journal of Low Temperature Physics 18, no. 7 (1992): 483–86. https://doi.org/10.1063/10.0033223.

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Dependence of the critical temperature of a superconductor with two overlapping conduction bands on the band filling is considered. The electrons are assumed to have parabolic dispersion laws and to interact within a layer near the Fermi surface. For superconductors with interband Cooper pairing the superconducting transition temperature as a function of the carrier density is nonmonotonic and resembles the analogous dependence in high-temperature superconductors.

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9

Changjan, Arpapong, and Pongkaew Udomsamuthirun. "London Penetration Depth of Fe-Based Superconductors." Advanced Materials Research 979 (June 2014): 297–301. http://dx.doi.org/10.4028/www.scientific.net/amr.979.297.

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Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. Fe-based superconductors are superconductors whose containing iron compounds and having a very high critical magnetic field. London penetration depth can assist in the study of the behavior of the critical magnetic field. The London penetration depth is the distance to which a magnetic field penetrates into a superconductor and becomes equal to 0.367879 times that of the magnetic field at the surface of

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10

Bigansolli, Antonio Renato, T. G. da Cruz, and Durval Rodrigues Jr. "Nondestructive Analysis of Bi2212 Bulk Superconducting Ceramics in the C-Axis Direction." Materials Science Forum 869 (August 2016): 29–34. http://dx.doi.org/10.4028/www.scientific.net/msf.869.29.

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The use of superconductors of high critical temperatures in applied superconductivity leads to higher operation temperatures and economy of cryogenic fluids. High temperature superconductor materials exhibits limited transport properties due to grain boundary weak-links and anisotropy on the critical currents. The texturing development in these superconductors decreases in an efficient way the number of high-angle grain boundaries, increasing the values of the critical current densities. Several quantitative analysis methods have been developed to study the morphologic and topologic characteri

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11

MASTROPIETRO, V. "ANOMALOUS BCS EQUATION FOR A LUTTINGER SUPERCONDUCTOR." Modern Physics Letters B 13, no. 17 (1999): 585–97. http://dx.doi.org/10.1142/s0217984999000749.

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A self-consistence equation describing a superconductor whose normal state is a Luttinger liquid is computed in a rigorous way by renormalization group techniques. The gap and the critical temperatures are quite different with respect to the ones of normal superconductors (i.e. superconductors whose normal state is a Fermi liquid) and in particular, the critical temperature can be quite high for suitable values of the parameters. Such self-consistence equation can be obtained in a BCS mean field theory for a model of two Mattis models exchanging Cooper pairs. The connection of this model with

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12

AHMAD, DAWOOD, TAE KWON SONG, IN SUK PARK, G. C. KIM, ZHI-AN REN, and Y. C. KIM. "ANALYSIS OF MAGNETIC CRITICAL FIELDS IN IRON-BASED SmFeAsO0.85 HIGH-Tc SUPERCONDUCTOR." Modern Physics Letters B 25, no. 24 (2011): 1939–48. http://dx.doi.org/10.1142/s0217984911027200.

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The magnetic properties of the newly discovered iron-oxypnictide SmFeAsO 0.85 high-Tc superconductor with a Tc of around 55 K were investigated. Bulk SmFeAsO 0.85 was prepared by a method for high-pressure synthesis. The lower critical field H c1 was estimated from the magnetization at low fields; H c1 (0) was measured to be 212 Oe. A linear temperature dependence instead of saturation at low temperatures in H c1 (T) revealed unconventional superconductivity with a nodal gap structure in our SmFeAsO 0.85 superconductor. The results showed that the well-known secondary peak in the temperature d

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13

Leroux, Maxime, Vivek Mishra, Jacob P. C. Ruff, et al. "Disorder raises the critical temperature of a cuprate superconductor." Proceedings of the National Academy of Sciences 116, no. 22 (2019): 10691–97. http://dx.doi.org/10.1073/pnas.1817134116.

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With the discovery of charge-density waves (CDWs) in most members of the cuprate high-temperature superconductors, the interplay between superconductivity and CDWs has become a key point in the debate on the origin of high-temperature superconductivity. Some experiments in cuprates point toward a CDW state competing with superconductivity, but others raise the possibility of a CDW-superconductivity intertwined order or more elusive pair-density waves (PDWs). Here, we have used proton irradiation to induce disorder in crystals of La1.875Ba0.125CuO4 and observed a striking 50% increase of Tc, ac

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14

Chen, Honggang, Yongbo Li, Yao Qi, Mingzhong Wang, Hongyan Zou, and Xiaopeng Zhao. "Critical Current Density and Meissner Effect of Smart Meta-Superconductor MgB2 and Bi(Pb)SrCaCuO." Materials 15, no. 3 (2022): 972. http://dx.doi.org/10.3390/ma15030972.

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The smart meta-superconductor MgB2 and Bi(Pb)SrCaCuO increase the superconducting transition temperature (TC), but the changes in the transport critical current density (JC) and Meissner effect are still unknown. Here, we investigated the JC and Meissner effect of smart meta-superconductor MgB2 and Bi(Pb)SrCaCuO. The use of the standard four-probe method shows that Y2O3:Eu3+ and Y2O3:Eu3++Ag inhomogeneous phase significantly increase the JC, and JC decreases to a minimum value at a higher temperature. The Meissner effect was measured by direct current magnetization. The doping of Y2O3:Eu3+ and

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15

Krasnoperov, Е. P. "From pulse measurements to the frequency current-voltagу characteristic of superconductors: step one". Superconductivity: Fundamental and Applied Research, № 4 (25 грудня 2024): 43–47. https://doi.org/10.62539/2949-5644-2024-0-4-43-47.

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The results of measurements in liquid nitrogen of volt-ampere characteristics (VAC) of high-temperature superconductor tapes for a decreasing alternating current with a period of τ ~ 9 ms are presented. In the case when the initial amplitude is 4 times greater than the critical current, after the first period the temperature exceeds the critical one, and a normal state occurs. This state is maintained until the current amplitude decreases to the level of the critical current of the superconductor. The experiment demonstrates the possibility of determining the conditions for using superconducto

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16

MOMENI, D., EIJI NAKANO, M. R. SETARE, and WEN-YU WEN. "ANALYTICAL STUDY OF CRITICAL MAGNETIC FIELD IN A HOLOGRAPHIC SUPERCONDUCTOR." International Journal of Modern Physics A 28, no. 08 (2013): 1350024. http://dx.doi.org/10.1142/s0217751x13500243.

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We analytically study the effect of magnetic field in a holographic superconductor by using Sturm–Liouville method. We estimate the coefficient of proportionality at critical temperature and find its dependence on bulk magnetic field. By exploring the phase diagrams of critical temperature and magnetic field for various condensates, we conclude that the existence of critical magnetic field is a general feature in holographic superconductors. We also study the quantum phase transition at zero temperature and find that the critical charge density increases linearly with the condensate dimension.

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17

POP, I., L. HOMORODEAN, I. BURDA та M. ANDRECUT. "STRUCTURAL, ELECTRICAL AND MAGNETIC PROPERTIES OF HIGH-TcYBa1.5Ca0.5Cu3O6+δ SUPERCONDUCTOR". Modern Physics Letters B 10, № 27 (1996): 1349–53. http://dx.doi.org/10.1142/s0217984996001528.

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A high-Tc YBa 1.5 Ca 0.5 Cu 3 O 6+δ superconductor was synthesized, with the critical temperature Tc=84.9 K. The crystalline structure is orthorhombic with the lattice parameters a=3.8665 Å, b=3.9217 Å and c=11.7652 Å, characteristic for the 123 superconductors. The diamagnetic transition in the temperature dependence of the magnetic susceptibility strongly depends on the recycling of the samples and the onset of superconductibility is depressed by the magnetic field intensity.

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18

Swinbanks, David. "High-critical-temperature superconductor made from glass." Nature 332, no. 6165 (1988): 575. http://dx.doi.org/10.1038/332575b0.

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19

Dahal, Kul Prasad. "Superconductivity: A Centenary Celebration." Himalayan Physics 2 (July 31, 2011): 26–34. http://dx.doi.org/10.3126/hj.v2i2.5207.

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Superconductivity was empirically discovered 100 years ago. This paper describes briefly the history and developments in critical temperature of different superconductors. Many efforts have been put on research and development so as to raise critical temperature. Different superconducting materials both conventional and unconventional have been discovered. The phenomenon of superconductivity is widely applicable in different fields of S&T so as to ease human life and activities. High - temperature superconductors have taken central stage as a dream material after long research and developm

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20

Mikitik, G. P., and A. S. Panfilov. "Estimation of the temperature derivative of the upper critical field and its anisotropy in high-temperature superconductors from fluctuation effects in heat capacity and magnetic susceptibility." Soviet Journal of Low Temperature Physics 16, no. 6 (1990): 468–70. https://doi.org/10.1063/10.0032645.

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A method based on the analysis of fluctuational contributions to heat capacity and magnetic susceptibility is proposed for estimating the temperature derivatives of upper critical fields of high-temperature superconductors. The fluctuational contribution to the magnetic susceptibility of YBa2Cu3O7 is investigated experimentally and estimates of derivatives are obtained for this superconductor.

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21

Omel’yanchuk, A. N., and I. O. Kulik. "Effect of strong electron–phonon interaction on the nonphonon mechanism of superconductivity." Soviet Journal of Low Temperature Physics 16, no. 9 (1990): 656–61. https://doi.org/10.1063/10.0032693.

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The change in the critical temperature of a superconductor due to the electron-phonon interaction (EPI) is calculated. The isotopic effect exponent α is found to be smaller than that obtained in the BCS theory; it differs from the classical value of 1/2 the more strongly, the higher the value of the ratio of the critical temperature Tc to the Debye temperature ΘD. The correction to the tunnel density of states of the superconductor is calculated, which is connected with the EPI characteristic function g(ω) and makes it possible to reconstruct this function through the measurement of the voltag

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22

Chanpoom, Thaipanya. "The Isotope Effect Coefficient with Pseudogap and One-Band Superconductor." Key Engineering Materials 675-676 (January 2016): 23–26. http://dx.doi.org/10.4028/www.scientific.net/kem.675-676.23.

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This research studied the isotope effect coefficient of high temperature superconductors. The model used one-band superconductor which considered the competition of superconducting gap and pseudogap in the below crossover temperature region. The isotope effect coefficient is derived and approximation in simplify form. We find that the isotope effect coefficient is decreased as the critical temperature Tc and the crossover temperature T* ratio Tc/T* increased.

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23

Zheng, Guo-qing. "High temperature spin-triplet topological superconductivity in K₂Cr₃As₃." Journal of Physics: Conference Series 2545, no. 1 (2023): 012001. http://dx.doi.org/10.1088/1742-6596/2545/1/012001.

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Abstract Spin-triplet superconductors are novel materials capable of harboring Majorana bound states that can be used in topological quantum computing. However, such bulk materials are still rare. Here we review the results that established K2Cr3As3 as a spin-triplet superconductor with transition temperature Tc as high as 6.5 K. We focus on the multiple-phases feature, and its exquisite distance to a ferromagnetic quantum critical point which is likely responsible for the high Tc . We touch on the topological aspects of the superconducting state, and suggest that it is a new route to the tech

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24

Jaroszyński, Leszek. "COMPUTER SIMULATION OF A SUPERCONDUCTING TRANSFORMER SHORT-CIRCUIT." Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska 14, no. 4 (2024): 71–74. https://doi.org/10.35784/iapgos.6769.

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High critical temperature superconductor power devices have unique characteristics that reduce energy losses during transmission and distribution of electricity. These superconductors allow for high current density, enabling the construction of smaller, lighter, and more transportable installations. A superconducting transformer can significantly reduce the dynamic effects of the short-circuit current during the initial milliseconds of a fault. High temperature superconductor windings, on the other hand, are relatively lightweight and have a low heat capacity. Despite being cryogenically coole

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25

Shewangzaw, Hamelo. "Overview of High Temperature Superconductivity in Iron Pnictides." J. of Physical and Chemical Sciences 7, no. 1 (2018): 01. https://doi.org/10.5281/zenodo.1692090.

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The discovery of new superconductor <em>LaFeAsOi-xFx </em>with a superconducting critical temperature, <em>Tc </em>of 26K in 2008 has quickly renewed interest in the exploration of iron based superconductors. More new superconductors have been discovered with the highest <em>Tc </em>of up to 55K being observed in the <em>SmF eAsO</em>1<em>-xFx </em>compound. High <em>Tc </em>have previously only been observed in cuprates, these new iron based superconductors have been added as second member of high <em>Tc </em>family. The crystal structur of these compounds contains an almost 2D Fe-As layer fo

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26

Li, Shaobo, Yabo Dan, Xiang Li, et al. "Critical Temperature Prediction of Superconductors Based on Atomic Vectors and Deep Learning." Symmetry 12, no. 2 (2020): 262. http://dx.doi.org/10.3390/sym12020262.

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In this paper, a hybrid neural network (HNN) that combines a convolutional neural network (CNN) and long short-term memory neural network (LSTM) is proposed to extract the high-level characteristics of materials for critical temperature (Tc) prediction of superconductors. Firstly, by obtaining 73,452 inorganic compounds from the Materials Project (MP) database and building an atomic environment matrix, we obtained a vector representation (atomic vector) of 87 atoms by singular value decomposition (SVD) of the atomic environment matrix. Then, the obtained atom vector was used to implement the c

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27

Fang-Ying, Liang. "Critical Temperature Characteristics of Layered High-Temperature Superconductor Under Pressure." Communications in Theoretical Physics 51, no. 4 (2009): 761–64. http://dx.doi.org/10.1088/0253-6102/51/4/33.

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ŠTRBÍK, V., Š. BEŇAČKA, Š. GAŽI, Š. CHROMIK, J. LEVÁRSKY, and J. SITH. "THE TEMPERATURE DEPENDENCE OF RESISTANCE AND CRITICAL CURRENT IN GRANULAR YBa2Cu3Ox SUPERCONDUCTING FILMS." Modern Physics Letters B 03, no. 09 (1989): 729–34. http://dx.doi.org/10.1142/s021798498900114x.

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Temperature dependence of resistance R(T) and critical transport current I c (T) was measured for high-Tc YBa 2 Cu 3 O x granular thin films prepared by vacuum co-evaporation. The results are interpreted in terms of superconductor-constriction-superconductor (ScS) or superconductor-normal metal-superconductor (SNS) models, shown to be more adequate than the superconductor-insulator-superconductor (SIS) one. The films with nearly the same superconducting phase transition can exhibit both metallic (dR/dT>0) or semiconductor (dR/dT<0) behavior at T>Tcon. This is ascribed to intragranular

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29

Rientong, Komkrit, Nattawut Natkunlaphat, and Udomsilp Pinsook. "Analysis of superconducting critical temperature using numerical method." Journal of Physics: Conference Series 2653, no. 1 (2023): 012054. http://dx.doi.org/10.1088/1742-6596/2653/1/012054.

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Abstract Currently, many studies have shown that the critical temperature (Tc) of a superconductor can be predicted by using the BCS theory. In this work, we analyse Tc of superconductors, which is determined by the spectral function (α2F(ω)) derived from the interaction between electrons and phonons. The equation that we used for the calculation is T c strong = f 1 f 2 T c weak . In this equation, T c weak refers to the Allen-Dynes formula and f is the correction factor. We compare the Tc obtained from this equation with our method. Many important parameters are given and analysed, such as av

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30

Maksuwan, Atirat, Arpapong Changjan, and Phanuchai Pramuanl. "THE APPLICATION OF ANALYSIS OF VARIANCE TO DIFFERENT IRON‑BASED SUPERCONDUCTOR CRITICAL TEMPERATURE MODELING." Suranaree Journal of Science and Technology 30, no. 4 (2023): 030128(1–9). http://dx.doi.org/10.55766/sujst-2023-04-e02609.

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Recently, Iron-based superconductors have shown promising properties of high critical temperature and high upper critical fields, which are prerequisites for applications in highfield magnets. Extensive research has been conducted on a modeling approach that contributes to predicting doped Iron-based superconductor critical temperature from structural and topological parameters. Statistical significance of differences in modeling approaches requires studies that can reliably distinguish between systematic approach effects and errors resulting from modeling approach variation. In this work, we

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Savchenko, M. A., and Elena Savchenko. "To the microscopic theory of the superconductive phase in antiferromagnetic metal compounds." Journal of V. N. Karazin Kharkiv National University, Series "Physics", no. 34 (July 16, 2021): 15–18. http://dx.doi.org/10.26565/2222-5617-2021-34-02.

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The theory of the conductivity in antiferromagnetic metal compounds is constructed on the basic of the fluctuational theory of the magnetic superconductors. The superconductor in which there exist localized magnetic moments was considered. It is supposed that magnetic moments are orientated antiferromagnetically in basis plane of the crystal. An estimation for the critical temperature was obtained and necessary and enough conditions of the appearance of high-temperature superconductive phase in rare earth metal compounds were got. The criterion of an appearance of the high-temperature supercon

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Idczak, Rafał, Wojciech Nowak, Bartosz Rusin, et al. "Enhanced Superconducting Critical Parameters in a New High-Entropy Alloy Nb0.34Ti0.33Zr0.14Ta0.11Hf0.08." Materials 16, no. 17 (2023): 5814. http://dx.doi.org/10.3390/ma16175814.

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The structural and physical properties of the new titanium- and niobium-rich type-A high-entropy alloy (HEA) superconductor Nb0.34Ti0.33Zr0.14Ta0.11Hf0.08 (in at.%) were studied by X-ray powder diffraction, energy dispersive X-ray spectroscopy, magnetization, electrical resistivity, and specific heat measurements. In addition, electronic structure calculations were performed using two complementary methods: the Korringa–Kohn–Rostoker Coherent Potential Approximation (KKR-CPA) and the Projector Augmented Wave (PAW) within Density Functional Theory (DFT). The results obtained indicate that the a

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33

Charikova, Tatiana B., Nina G. Shelushinina, German I. Harus, et al. "Anomalous Temperature Dependence of the Upper Critical Magnetic Field in Electron-Doped High-Temperature Superconductor." Solid State Phenomena 233-234 (July 2015): 729–32. http://dx.doi.org/10.4028/www.scientific.net/ssp.233-234.729.

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We present resistivity measurements of the upper critical field as a function of temperature for Nd2-xCexCuO4+δ/SrTiO3single crystal films near antiferromagnetic-superconducting phase boundary (x= 0.14) in magnetic fields up to 90kOe at temperatures down to 0.7K. The data are well described by a two-band/two-gap model for a superconductor in the dirty limit.

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Hajko, V., O. Hudák, Š. Molokáč, M. Seman, M. Timko, and A. A. Zentko. "High-temperature anomalies in Sm–Ba–Cu–O superconductor." Soviet Journal of Low Temperature Physics 14, no. 2 (1988): 119–20. https://doi.org/10.1063/10.0031884.

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Superconducting Sm–Ba–Cu–O strips were prepared by rapid quenching followed by annealing. The experimental results on magnetic susceptibility and resistance revealed their anomalous behavior at temperatures above 140 K. According to estimates, the critical field Hc1 = 0 at Tc ≈ 356 K. The values of critical current Ic≈7·10−5 and resistance drop ≲9·108 were obtained at room temperature. The above anomalies were observed in the samples under investigation for four weeks.

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35

Wiejaczka, J. A., and L. F. Goodrich. "Interlaboratory comparison on high-temperature superconductor critical-current measurements." Journal of Research of the National Institute of Standards and Technology 102, no. 1 (1997): 29. http://dx.doi.org/10.6028/jres.102.004.

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36

Bracanovic, D., P. A. J. de Groot, M. Oussena, et al. "The critical state in YBa2Cu3O7 − x high temperature superconductor." Cryogenics 37, no. 10 (1997): 555–57. http://dx.doi.org/10.1016/s0011-2275(97)00044-1.

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Nakane, Hideaki, Yoshinobu Tarutani, Toshikazu Nishino, Hiroji Yamada, and Ushio Kawabe. "DC-SQUID with High-Critical-Temperature Oxide-Superconductor Film." Japanese Journal of Applied Physics 26, Part 2, No. 11 (1987): L1925—L1926. http://dx.doi.org/10.1143/jjap.26.l1925.

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Khalid, Nurul Auni, Mohd Mustafa Awang Kechik, Nur Atikah Baharuddin та ін. "Carbon nanofibers addition on transport and superconducting properties of bulk YBa2Cu3O7−δ material prepared via co-precipitation". Journal of Materials Science: Materials in Electronics 31, № 19 (2020): 16983–90. http://dx.doi.org/10.1007/s10854-020-04255-0.

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Abstract The effects of carbon nanofibers addition on transport and superconducting properties of YBa2Cu3O7−δ (Y-123) superconductor were studied. Y-123 was prepared using co-precipitation method for good quality bulk of high temperature superconducting material. Carbon nanofibers with 0.2–0.8 wt% were added into Y-123 superconductors. The samples were characterized using electrical resistance measurement for critical temperature (Tc) and critical current density (Jc), powder X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray analysis. Most of the samples indicated a d

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Smolyaninov, Igor I., and Vera N. Smolyaninova. "Is There a Metamaterial Route to High Temperature Superconductivity?" Advances in Condensed Matter Physics 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/479635.

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Superconducting properties of a material such as electron-electron interactions and the critical temperature of superconducting transition can be expressed via the effective dielectric response functionεeff(q,ω) of the material. Such a description is valid on the spatial scales below the superconducting coherence length (the size of the Cooper pair), which equals ∼100 nm in a typical BCS superconductor. Searching for natural materials exhibiting larger electron-electron interactions constitutes a traditional approach to high temperature superconductivity research. Here we point out that recent

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Ishida, Shigeyuki, Daniel Kagerbauer, Sigrid Holleis, et al. "Superconductivity-driven ferromagnetism and spin manipulation using vortices in the magnetic superconductor EuRbFe4As4." Proceedings of the National Academy of Sciences 118, no. 37 (2021): e2101101118. http://dx.doi.org/10.1073/pnas.2101101118.

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Magnetic superconductors are specific materials exhibiting two antagonistic phenomena, superconductivity and magnetism, whose mutual interaction induces various emergent phenomena, such as the reentrant superconducting transition associated with the suppression of superconductivity around the magnetic transition temperature (Tm), highlighting the impact of magnetism on superconductivity. In this study, we report the experimental observation of the ferromagnetic order induced by superconducting vortices in the high-critical-temperature (high-Tc) magnetic superconductor EuRbFe4As4. Although the

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Méndez-Moreno, R. M. "A Schematic Two Overlapping-Band Model for Superconducting Sulfur Hydrides: The Isotope Mass Exponent." Advances in Condensed Matter Physics 2019 (October 10, 2019): 1–7. http://dx.doi.org/10.1155/2019/6795250.

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The high value of the isotope shift in sulfur hydrides supports a phonon-mediated pairing scenario of superconductivity for these high-temperature superconductors which are consistent with the Bardeen–Cooper–Schrieffer (BCS) framework. Knowing that a large electronic density of states enhances the critical temperature (Tc), generalized Fermi surface topologies are used to increase it. A multicomponent model within the BCS framework is proposed in this work for sulfur hydride superconductors. This model is used to evaluate some properties of the H3S superconductor. Strong and intermediate coupl

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Tolendiuly, S., S. M. Fomenko, G. C. Dannangoda, and K. S. Martirosyan. "Self-Propagating High Temperature Synthesis of MgB2 Superconductor in High-Pressure of Argon Condition." Eurasian Chemico-Technological Journal 19, no. 2 (2017): 177. http://dx.doi.org/10.18321/ectj649.

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<p>Magnesium diboride can be synthesized under argon ambient, elevated or high pressures. High-pressure syntheses are promising methods for manufacturing of the bulk MgB<sub>2</sub> superconductor material. We have been used high pressure of Ar gas in order to investigate its effect on properties of MgB<sub>2</sub> superconductor such as critical temperature and current density. Bulk MgB<sub>2</sub> superconductor was synthesized from elemental Mg–B powders in thermal explosion mode of self-propagating high-temperature synthesis (SHS) under argon press

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VERES, T., and M. CRISAN. "INFLUENCE OF THE ANTIFERROMAGNETIC CORRELATIONS ON THE CRITICAL TEMPERATURE OF THE HIGH TEMPERATURE SUPERCONDUCTORS." Modern Physics Letters B 05, no. 17 (1991): 1161–65. http://dx.doi.org/10.1142/s0217984991001416.

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The decreasing of the critical temperature of a high temperature superconductor due to the antiferromagnetic correlations and impurities has been calculated using a phenomenological model for the dynamic susceptibility considered in the explanations of the nuclear magnetic resonance, neutron scattering, tunneling experiments and the photoemission spectra. A good agreement with the experimental data has been obtained taking realistic values for the fit parameters.

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Lee, Sang Heon. "Measurement and Analysis of Magnetic Properties of YBa2Cu3O7-y Bulk Superconductor." Journal of Nanoelectronics and Optoelectronics 15, no. 1 (2020): 122–26. http://dx.doi.org/10.1166/jno.2020.2671.

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YBa2Cu3O7-y single crystal bulk high-temperature superconductor has high critical current density with large magnetic levitation and trapping magnetic forces. Despite its distinctive electromagnetic properties, the longtime heat treatment process of oxide high-temperature superconductor, a ceramic material, is widely considered as a factor that can degrade industrial applicability of superconductors seriously. For applications in power systems, metal-ceramic composites need to be fabricated to enhance magnetic performance. In this study, CeO2 was utilized as an additive to control Y211 particl

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Yang, Peidong, and Charles M. Lieber. "Nanostructured high-temperature superconductors: Creation of strong-pinning columnar defects in nanorod/superconductor composites." Journal of Materials Research 12, no. 11 (1997): 2981–96. http://dx.doi.org/10.1557/jmr.1997.0393.

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A chemical approach to the formation of columnar defects involving the growth and incorporation of MgO nanorods into high temperature superconductors (HTS's) has been developed. MgO nanorods were incorporated into Bi2Sr2CaCu2Oz, Bi2Sr2Ca2Cu3Oz, and Tl2Ba2Ca2Cu3Oz superconductors at areal densities up to 2 × 1010/cm2. Microstructural analyses of the composites demonstrate that the MgO nanorods create a columnar defect structure in the HTS matrices, form a compositionally sharp interface with the matrix, and self-organize into orientations perpendicular and parallel to the copper oxide planes. M

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Kong, Wei, Nurul Auni Khalid, Wani Nadhirah Titingan Nizam, et al. "Enhanced Transport Critical Current Density of Tl-1212 Bulk Superconductor Added with Nickel-Zinc Ferrite Nanoparticles." Solid State Phenomena 317 (May 2021): 125–30. http://dx.doi.org/10.4028/www.scientific.net/ssp.317.125.

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High temperature superconductor Tl-1212 with nominal starting composition (Tl0.85Cr0.15)Sr2CaCu2O7-δ was prepared with high purity oxide powders using a solid state reaction method. Small amounts of nickel-zinc ferrite nanoparticles (Ni0.5Zn0.5Fe2O4) at compositions 0.01, 0.02, 0.05 and 0.10 wt. % were added into Tl-1212 superconductors. The effect of Ni0.5Zn0.5Fe2O4 nanoparticles’ addition on the critical temperature (Tc), transport critical current density (Jc), phase formation, and morphology was studied. The samples were characterized using electrical resistance measurement, transport crit

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Kong, Wei, Ing Kong, Mohd Mustafa Awang Kechik та Roslan Abd-Shukor. "Phase Formation and Electrical Transport Properties of Nano-Sized SnO₂ Added (Tl_0.85Cr_0.15)Sr₂CaCu₂O_7-δSuperconductors". Solid State Phenomena 268 (жовтень 2017): 315–19. http://dx.doi.org/10.4028/www.scientific.net/ssp.268.315.

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In this work, the effect of nano-sized SnO2 addition on the phase formation and electrical transport properties of (Tl0.85Cr0.15)Sr2CaCu2O7-δ (Tl-1212) superconductor was investigated. Thallium-based high temperature superconductor (HTS) with nominal starting composition (Tl0.85Cr0.15) Sr2CaCu2O7-δ was prepared using high purity oxide powders via solid state reaction method. Nano-sized SnO2 with 0.01 – 0.05 wt.% were added into Tl-1212 superconductors. The characteristic of the samples were determined by powder X-ray diffraction method (XRD), scanning electron microscopy (SEM), energy dispersi

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Herbirowo, Satrio, Hedy Putra Pratama, Akhmad Herman Yuwono, Nofrijon Sofyan, and Agung Imaduddin. "A Comparative Study of the Manufacturing of BPSCCO Superconducting Wire with TiO₂ Dopants." Key Engineering Materials 897 (August 17, 2021): 79–84. http://dx.doi.org/10.4028/www.scientific.net/kem.897.79.

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Bi-Pb-Sr-Ca-Cu-O (BPSCCO) superconductors are recognized as a projectable high-temperature superconductor for high-efficiency electrical applications. The addition of Ti enhances the formation of the Bi-2223 phase from the BPSCCO superconductor. The process of producing BPSCCO superconducting materials with TiO2 dopants is performed by the solid-state process and the production of wire rolling, consisting of bismuth (III) oxide powder (Bi2O3 = 99%), Strontium Carbonate powder (SrCO3 = 99%), Calcium Carbonate powder (CaCO3 = 99%), Copper Oxide powder (CuO2 = 99%), Lead Oxide powder (PbO2 = 98%)

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Shi, Donglu. "Properties and Defects of Type II Superconductors." MRS Bulletin 16, no. 12 (1991): 37–41. http://dx.doi.org/10.1557/s0883769400055330.

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Three major superconducting parameters can characterize a type II superconductor: critical transition temperature, Tc, upper critical magnetic field, Hc2, and critical current density, Jc. Because of the variety of crystal structures, chemical stoichiometrics, and microstructures of the materials, these superconducting parameters differ greatly from system to system.It has been found that the critical transition temperature is closely related to the crystal structure and stoichiometry. Previous studies have shown that compounds with a high degree of symmetry tend to be more favorable to superc

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Maksimova A. N., Rudnev I. A., Kashurnikov I. A., and Moroz A. N. "Effect of an Array of Submicron Magnetic Dots on Magnetization, Critical Current, and the Structure of Vortex Configurations in HTS." Physics of the Solid State 65, no. 4 (2023): 517. http://dx.doi.org/10.21883/pss.2023.04.55989.500.

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A vortex lattice in a high-temperature superconductor (HTS) with an array of submicron magnetic dots on the surface has been studied by the Monte Carlo method within the framework of a three-dimensional model of a layered high-temperature superconductor. The adjustment of the vortex lattice to an array of magnetic points was observed --- ordered states arising in the process of remagnetization --- configurations of one, two, three, or more vortex filaments fixed to a single magnetic point. The occurrence of these configurations was accompanied by peaks on the magnetization curve. The influence

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