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Journal articles on the topic 'Microscopic magnets'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Fields, R. Douglas. "Stimulating the Brain with Microscopic Magnets." Scientific American Mind 23, no. 6 (2012): 14. http://dx.doi.org/10.1038/scientificamericanmind0113-14b.

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2

Garlatti, Elena, Alessandro Chiesa, Pietro Bonfà, et al. "A Cost-Effective Semi-Ab Initio Approach to Model Relaxation in Rare-Earth Single-Molecule Magnets." J. Phys. Chem. Lett. 12 (September 8, 2021): 8826–32. https://doi.org/10.1021/acs.jpclett.1c02367.

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We discuss a cost-effective approach to understand magnetic relaxation in the new generation of rare-earth single-molecule magnets. It combines ab initio calculations of the crystal field parameters, of the magneto-elastic coupling with local modes, and of the phonon density of states with fitting of only three microscopic parameters. Although much less demanding than a fully ab initio approach, the method gives important physical insights into the origin of the observed relaxation. By applying it to high-anisotropy compounds with very different relaxation, we dem

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3

Zickler, Gregor A., and Josef Fidler. "Nanocompositional Electron Microscopic Analysis and Role of Grain Boundary Phase of Isotropically Oriented Nd-Fe-B Magnets." Advances in Materials Science and Engineering 2017 (2017): 1–17. http://dx.doi.org/10.1155/2017/1461835.

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Nanoanalytical TEM characterization in combination with finite element micromagnetic modelling clarifies the impact of the grain misalignment and grain boundary nanocomposition on the coercive field and gives guidelines how to improve coercivity in Nd-Fe-B based magnets. The nanoprobe electron energy loss spectroscopy measurements obtained an asymmetric composition profile of the Fe-content across the grain boundary phase in isotropically oriented melt-spun magnets and showed an enrichment of iron up to 60 at% in the Nd-containing grain boundaries close to Nd2Fe14B grain surfaces parallel to t

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4

Laskowski, Lukasz, Iwan Kityk, Piotr Konieczny, Oleksandr Pastukh, Mateusz Schabikowski, and Magdalena Laskowska. "The Separation of the Mn12 Single-Molecule Magnets onto Spherical Silica Nanoparticles." Nanomaterials 9, no. 5 (2019): 764. http://dx.doi.org/10.3390/nano9050764.

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The Mn12 single-molecule magnets (SMMs) could be attached to the surface of spherical silica for the first time with a high probability. This allowed separation of the individual molecular magnets and direct microscopic observation of the SMMs. We described in detail how to fabricate such a composite material. The synthesis procedure proposed here is simple and efficient. We confirmed the efficiency of the method by transmission electron microscopy (TEM): single-molecule magnets were visible at the surface of a silica substrate. Based on TEM observation, we described how the molecules anchor t

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5

Loewenhaupt, M., and P. Fabi. "Microscopic parameters of RT hard magnets." Journal of Alloys and Compounds 207-208 (June 1994): 146–52. http://dx.doi.org/10.1016/0925-8388(94)90195-3.

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6

Dziob, Daniel, Jakub Ramian, Jan Ramian, Bartosz Lisowski, and Jadwiga Laska. "Design and Construction of a Chamber Enabling the Observation of Living Cells in the Field of a Constant Magnetic Force." Cells 10, no. 12 (2021): 3339. http://dx.doi.org/10.3390/cells10123339.

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The aim of the work was to design and construct a microscopic stage that enables the observation of biological cells in a magnetic field with a constant magnetic force. Regarding the requirements for biological observations in the magnetic field, construction was based on the standard automatic stage of an optical microscope ZEISS Axio Observer, and the main challenge was to design a set of magnets which were the source of a field in which the magnetic force was constant in the observation zone. Another challenge was to design a magnet arrangement producing a weak magnetic field to manipulate

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7

Sen, Arpita, and Prasenjit Sen. "Designing rare earth free permanent magnets: insights from small Co clusters." Physical Chemistry Chemical Physics 21, no. 40 (2019): 22577–83. http://dx.doi.org/10.1039/c9cp04553h.

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With the ultimate goal of rational design of rare earth free permanent magnets, microscopic origins of large MAE in Co<sub>4</sub> clusters doped with group 14 and 15 elements are investigated using DFT.

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8

Brumfield, Amelia, and Jason Haraldsen. "Thermodynamics and Magnetic Excitations in Quantum Spin Trimers: Applications for the Understanding of Molecular Magnets." Crystals 9, no. 2 (2019): 93. http://dx.doi.org/10.3390/cryst9020093.

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Molecular magnets provide a playground of interesting phenomena and interactions that have direct applications for quantum computation and magnetic systems. A general understanding of the underlying geometries for molecular magnets therefore generates a consistent foundation for which further analysis and understanding can be established. Using a Heisenberg spin-spin exchange Hamiltonian, we investigate the evolution of magnetic excitations and thermodynamics of quantum spin isosceles trimers (two sides J and one side α J ) with increasing spin. For the thermodynamics, we produce exact general

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9

Nemoianu, Iosif Vasile, Cristian George Dragomirescu, Veronica Manescu (Paltanea), Maria-Iuliana Dascalu, Gheorghe Paltanea, and Radu Mircea Ciuceanu. "Self-Organizing Equilibrium Patterns of Multiple Permanent Magnets Floating Freely under the Action of a Central Attractive Magnetic Force." Symmetry 14, no. 4 (2022): 795. http://dx.doi.org/10.3390/sym14040795.

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The present communication revisits the almost century-and-a-half-old problem of some identical small magnets floating freely on the water’s surface under the action of a superimposing magnetic field created by a stronger magnet placed above them. Originally introduced and performed by Alfred Marshall Mayer and reported in a series of articles starting from 1878 onward, the proposed experiments were intended to provide a model (theoretical and educational) for the building block of matter that, at a microscopic level, is the atom. The self-organizing patterns formed by the repelling small magne

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10

Wang, Zhan, Jiawang Xu, Zhuolin Li, et al. "Real-space observation of magnetic transitions in RMn₆Sn₆ (R = Ho, Dy) kagome magnets." Applied Physics Letters 122, no. 11 (2023): 112401. http://dx.doi.org/10.1063/5.0140731.

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Rare-earth RMn6Sn6 magnets reattract the attention due to their recently discovered topological properties in a strong correlation with a kagome magnetic lattice and different rare-earth magnetic elements. To understand the microscopic mechanism and discover topological spin textures, we report here the real-space observation of temperature-induced spin reorientation transition in RMn6Sn6 (R = Ho, Dy) magnets. The magnetic domain evolution corresponding to the magnetization deviation from the ab-plane into a cone state is in situ demonstrated by using Lorenz transmission electron microscopy an

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11

Wang, Bing-Wu, Zhe-Ming Wang, and Song Gao. "Organometallic Single-Ion Magnets." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C274. http://dx.doi.org/10.1107/s2053273314097253.

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The single-molecule magnets (SMMs) are attracting the increasing interesting due to their potential applications in high density information storage, quantum computing, molecular spintronics, and magnetic refrigeration. This field provides scientists a possible access into the crossover of the classical and quantum world, and a wonderful model to study the fascinating magnetic properties between microscopic and macroscopic materials, such as slow magnetization relaxation and quantum tunneling effect. After the milestone discovery of the first single-molecule magnets (SMMs) Mn12ac, many new SMM

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12

Khundzakishvili, Guga, Bishnu Prasad Belbase, Pravin Mahendran, et al. "Criticality and Magnetic Phases of Ising Shastry–Sutherland Candidate Holmium Tetraboride." Materials 18, no. 11 (2025): 2504. https://doi.org/10.3390/ma18112504.

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Frustrated magnetic systems arising in geometrically constrained lattices represent rich platforms for exploring unconventional phases of matter, including fractional magnetization plateaus, incommensurate orders and complex domain dynamics. However, determining the microscopic spin configurations that stabilize such phases is a key challenge, especially when in-plane and out-of-plane spin components coexist and compete. Here, we combine neutron scattering and magnetic susceptibility experiments with simulations to investigate the emergence of field-induced fractional plateaus and the related

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13

Ivanov, B. A., and S. N. Lyakhimets. "Theory of a dynamical coercive force in magnets with microscopic defects." IEEE Transactions on Magnetics 30, no. 2 (1994): 824–27. http://dx.doi.org/10.1109/20.312421.

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14

FALLOUL, M. A., and M. EL HAFIDI. "MAGNONS AND DIPOLAR INTERACTIONS BETWEEN NEW HIGH SPIN MAGNETS." Modern Physics Letters B 25, no. 17 (2011): 1427–39. http://dx.doi.org/10.1142/s021798491102653x.

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In this work, we elucidate the role of various microscopic interactions in high spin molecular nanomagnets. Starting from an effective spin Hamiltonian, we explain the origin and the importance of each coupling. We give special attention to exchange and dipole–dipole interactions between molecular magnets in a cubic lattice. The dispersion relation and magnetization behaviors are analyzed in the quantum magnons formalism taking into account the experimental reality and using common parameters values.

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15

Povzner, A. A. "Distinctive features of ferromagnetic and helimagnetic ordering in weak itinerant magnets." Soviet Journal of Low Temperature Physics 11, no. 7 (1985): 429–30. https://doi.org/10.1063/10.0031331.

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An approach to the theory of ferromagnetic and helimagnetic ordering in weak itinerant magnets is developed on the basis of the concept of reaction fields. The theory considered in the paper allows the causes of some features of the magnetization and the comparatively high Curie and Néel temperatures of the materials considered to be explained without invoking specific microscopic exchange-interaction models.

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16

Yu, Sizhuo, Yuan Gao, Bin-Bin Chen, and Wei Li. "Learning the Effective Spin Hamiltonian of a Quantum Magnet." Chinese Physics Letters 38, no. 9 (2021): 097502. http://dx.doi.org/10.1088/0256-307x/38/9/097502.

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To understand the intriguing many-body states and effects in the correlated quantum materials, inference of the microscopic effective Hamiltonian from experiments constitutes an important yet very challenging inverse problem. Here we propose an unbiased and efficient approach learning the effective Hamiltonian through the many-body analysis of the measured thermal data. Our approach combines the strategies including the automatic gradient and Bayesian optimization with the thermodynamics many-body solvers including the exact diagonalization and the tensor renormalization group methods. We show

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17

Blank, R. "Microscopic model for the demagnetization curve of nucleation type magnets SmCo5 and Nd2Fe14B." Journal of Magnetism and Magnetic Materials 83, no. 1-3 (1990): 192–94. http://dx.doi.org/10.1016/0304-8853(90)90481-5.

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18

Orefice, Martina, Amy Van den Bulck, Bart Blanpain, and Koen Binnemans. "Selective Roasting of Nd–Fe‒B Permanent Magnets as a Pretreatment Step for Intensified Leaching with an Ionic Liquid." Journal of Sustainable Metallurgy 6, no. 1 (2019): 91–102. http://dx.doi.org/10.1007/s40831-019-00259-1.

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AbstractOxidative roasting of Nd–Fe‒B permanent magnets prior to leaching improves the selectivity in the recovery of rare-earth elements over iron. However, the dissolution rate of oxidatively roasted Nd–Fe‒B permanent magnets in acidic solutions is very slow, often longer than 24 h. Upon roasting in air at temperatures above 500 °C, the neodymium metal is not converted to Nd2O3, but rather to the ternary NdFeO3 phase. NdFeO3 is much more difficult to dissolve than Nd2O3. In this work, the formation of NdFeO3 was avoided by roasting Nd–Fe‒B permanent magnet production scrap in argon atmospher

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19

Hayami, Satoru. "Skyrmion Crystal Induced by Four-Spin Interactions in Itinerant Triangular Magnets." Magnetism 4, no. 3 (2024): 281–94. http://dx.doi.org/10.3390/magnetism4030018.

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We investigate the emergence of magnetic skyrmion crystals with swirling topological spin textures in itinerant magnets with an emphasis on momentum-resolved multi-spin interactions. By performing the simulated annealing for the effective spin model with the two-spin and four-spin interactions on a two-dimensional triangular lattice, we show that various types of four-spin interactions become the microscopic origin of the magnetic skyrmion crystal with the skyrmion numbers of one and two. We find that the four-spin interactions between the different wave vectors lead to the skyrmion crystal wi

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20

SMIRNOV, A. "Microscopic magnetic phase separation at the impurity stimulated antiferromagnetic ordering of two spin-gap magnets." Physica B: Condensed Matter 329-333 (May 2003): 699–700. http://dx.doi.org/10.1016/s0921-4526(02)02011-2.

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21

Novoa, J. J., M. Deumal, and J. Jornet-Somoza. "Calculation of microscopic exchange interactions and modelling of macroscopic magnetic properties in molecule-based magnets." Chemical Society Reviews 40, no. 6 (2011): 3182. http://dx.doi.org/10.1039/c0cs00112k.

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22

Vučković, Ana N., Saša S. Ilić, and Slavoljub R. Aleksić. "Interaction Magnetic Force Calculation of Ring Permanent Magnets Using Ampere's Microscopic Surface Currents and Discretization Technique." Electromagnetics 32, no. 2 (2012): 117–34. http://dx.doi.org/10.1080/02726343.2012.645430.

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23

Dyadkin, Vadim, and Dmitry Chernyshov. "Structural and Magnetic Chirality of Cu2OSeO3." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1548. http://dx.doi.org/10.1107/s2053273314084514.

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We determine the chirality of the magnetic and crystal structures, respectively, for the magnetoelectric insulator Cu2OSeO3using small-angle diffraction of polarized neutrons and resonant contribution to X-ray single crystal diffraction of synchrotron radiation. This compound crystallizes in the P213 space group similar to other chiral but metallic magnets, such as MnSi, MnGe, MnSi1+xGex, Fe1+xCoxSi, Mn1+xFexSi, Mn1+xCoxSi, FeGe, Mn1+xFexGe. It has recently been shown that the structural and magnetic chiralities for metallic helimagnets are linked to each other [1], also in the so-called skyrm

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24

Embi Bs, Abraham A. "HAIR AND BLOOD ENDOGENOUS LOW LEVEL BIOMAGNETIC FIELDS CROSS-TALK EFFECTS ON FIBRIN INHIBITION AND ROULEAU FORMATION." International Journal of Research -GRANTHAALAYAH 6, no. 11 (2018): 200–208. http://dx.doi.org/10.29121/granthaalayah.v6.i11.2018.1118.

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This manuscript introduces a microscopic tabletop technique that demonstrates endogenous biomagnetic fields tissue crosstalk; namely the human hair and human blood. This interaction induces red blood cells (RBCs) agglutination and Rouleaux Formations. Man made exogenous static magnets as well as pulsating low-level magnetic fields have been applied to small animals and shown to affect blood parameters. Those experiments showed an increase in blood coagulation time attributed to the treatment. Ever since the development of a tabletop technique (introduced in 2016) numerous papers have demonstra

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Abraham, A. Embi Bs. "HAIR AND BLOOD ENDOGENOUS LOW LEVEL BIOMAGNETIC FIELDS CROSS-TALK EFFECTS ON FIBRIN INHIBITION AND ROULEAU FORMATION." International Journal of Research - Granthaalayah 6, no. 11 (2018): 200–208. https://doi.org/10.5281/zenodo.1845985.

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This manuscript introduces a microscopic tabletop technique that demonstrates endogenous biomagnetic fields tissue crosstalk; namely the human hair and human blood. This interaction induces red blood cells (RBCs) agglutination and Rouleaux Formations. Man made exogenous static magnets as well as pulsating low-level magnetic fields have been applied to small animals and shown to affect blood parameters. Those experiments showed an increase in blood coagulation time attributed to the treatment. Ever since the development of a tabletop technique (introduced in 2016) numerous papers have demonstra

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26

Koretsky, Alan P., Afonso Costa e Silva, and Yi-Jen Lin. "Functional information from magnetic resonance imaging." Proceedings, annual meeting, Electron Microscopy Society of America 53 (August 13, 1995): 84–85. http://dx.doi.org/10.1017/s0424820100136799.

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Magnetic resonance imaging (MRI) has become established as an important imaging modality for the clinical management of disease. This is primarily due to the great tissue contrast inherent in magnetic resonance images of normal and diseased organs. Due to the wide availability of high field magnets and the ability to generate large and rapidly switched magnetic field gradients there is growing interest in applying high resolution MRI to obtain microscopic information. This symposium on MRI microscopy highlights new developments that are leading to increased resolution. The application of high

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27

Yue, Yunliang. "Electronic and magnetic properties of monolayer MnS2." Modern Physics Letters B 30, no. 36 (2016): 1650419. http://dx.doi.org/10.1142/s0217984916504194.

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First-principles calculations are performed to study the electronic and magnetic properties of monolayer MnS2. Based on the electronic structure, a half-metallic state is predicted for monolayer MnS2. The magnetic moment is 3.0 [Formula: see text] per formula unit, and the main contribution is localized at the transition metal site Mn with a local moment of 3.733 [Formula: see text]. The magnetic anisotropy energy (MAE) is 0.056 meV per formula unit with an easy axis perpendicular to the plane, and it indicates that monolayer MnS2 belongs to the category of Ising magnets. The positive MAE of n

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28

Saito, Kotaro, Nobuhito Inami, Yasuo Takeichi, et al. "Magnetic structure analysis of rare earth permanent magnet Sm2Fe17N3." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1460. http://dx.doi.org/10.1107/s2053273314085398.

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Rare earth intermetallic compound Sm2Fe17N3 exhibits notalble magnetic properties such as high Curie temperature and high coercivity which are very suitable for permanent magnets [1,2]. Although microscopic magnetic structure is one of the basic information for magnetic materials, there is no report about the magnetic structure of Sm2Fe17N3 for our knowledge. This is because samarium's neutron absorption cross section is huge enough to make researchers hesitate to have neutron diffraction experiments of Sm compounds. We have carried out powder neutron diffraction measurement of Sm2Fe17N3 with

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Taniguchi, Y., E. Nakazawa та S. Taya. "Trial production of γ-type energy filtering TEM". Proceedings, annual meeting, Electron Microscopy Society of America 53 (13 серпня 1995): 604–5. http://dx.doi.org/10.1017/s0424820100139391.

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Imaging energy filters can add new information to electron microscopic images with respect to energy-axis, so-called electron spectroscopic imaging (ESI). Recently, many good results have been reported using this imaging technique. ESI also allows high-contrast observation of unstained biological samples, becoming a trend of the field of morphology. We manufactured a new type of energy filter as a trial production. This energy filter consists of two magnets, and we call γ-filter since the trajectory of electrons shows ‘γ’-shape inside the filter. We evaluated the new energyγ-filter TEM with th

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30

Zhao, Ran, Haiquan Wang, Yafeng Shi, Zhifang Zhu, and Bing Zhang. "Low-temperature manufacturable, recyclable, and reconfigurable liquid-metal bonded NdFeB magnets for sensors and robotics." AIP Advances 14, no. 1 (2024). http://dx.doi.org/10.1063/5.0175503.

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This work presents a recyclable liquid-metal/NdFeB composite magnet (LM magnet) with a reconfigurable shape and polarity. Taking advantage of the low-temperature phase-transition property of LMs, we can re-orient the NdFeB particles and reshape the LM magnets, to produce complex magnetization profiles or complex structured magnets. The manufacturing of LM magnets was realized at low temperatures by using a template and paired permanent magnets. The microscopic morphology and elemental composition of the LM magnet were analyzed by scanning electron microscopy and energy dispersive spectroscopy,

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31

Zhang, Miaomiao, Jianqi Mao, Yixing Li, et al. "A novel magnetic compression technique for cystostomy in rabbits." Scientific Reports 12, no. 1 (2022). http://dx.doi.org/10.1038/s41598-022-16595-4.

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AbstractMagnetic compression technique (MCT) is a popular new anastomosis method. In this paper, we aimed to explore the feasibility of use of MCT for performing cystotomy in rabbits. The parent magnets and daughter magnets for rabbit cystostomy were designed and manufactured according to the anatomical characteristics of rabbit lower urinary tract. Twelve female New Zealand rabbits were used as animal models. After anesthesia, a daughter magnet was inserted into the bladder through the urethra, and the parent magnet was placed on the body surface projection of the bladder over the abdominal w

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32

Li, Weizhou, Jungang Cheng, Xusheng Lu, et al. "Enhancement of local anti-demagnetization ability of permanent magnet by selected area grain boundary diffusion toward high-speed motors." AIP Advances 14, no. 3 (2024). http://dx.doi.org/10.1063/9.0000757.

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The working environment of permanent magnets in high-speed motors is harsh, because they are seriously affected by multi-physical fields such as temperature, stress, weak magnetic control field, etc., and irreversible demagnetization is easy to occur under the extreme working conditions. In this work, a model of high-speed Interior Permanent magnet Motor is established, the easy demagnetization area of the permanent magnet is simulated by electromagnetic and thermal simulations to determine, and its local anti-demagnetization optimization is performed. Dy/Tb co-infiltration is carried out in t

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Fidler, Josef, J. Bernardi, and P. Skalicky. "Analytical Electron Microscope Study of High- and Low-Coercivity SmCo 2:17 Magnets." MRS Proceedings 96 (1987). http://dx.doi.org/10.1557/proc-96-181.

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ABSTRACTSintered, precipitation hardened SmCo 2:17 magnets contain a multiphase microstructure. Our electron microscopic investigations reveal that the size of the rhombic, cellular precipitation structure and the formation of cell interior and cell boundary phases is determined by the nominal composition of the alloy and the postsintering heat treatment conditions and primarily control the intrinsic coercivity of the magnet. Selected area electron diffraction together with high resolution electron microscopy showed a high density of basal stacking faults (microtwinning) of the cell interior p

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34

Wang, Chao, Bang-chen Li, Yuan-zhe Fu, Suo Bai, Yanli Liu, and Zhubai Li. "Macroscopic phenomenon of exchange coupling and microscopic effect on magnetization reversal in sintered Nd-Fe-B magnets." Journal of Physics D: Applied Physics, March 12, 2024. http://dx.doi.org/10.1088/1361-6463/ad32ee.

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Abstract The permanent magnets of Nd13.5Fe79.18M1.52B5.8 and Nd13.5Fe79.76M0.94B5.8 were prepared, respectively, via strip casting, jet milling and sintering followed by annealing, and adding the non-ferromagnetic elements M (Al, Cu, Ga and Zr) could not only modify the microstructure, but also regulate the exchange coupling effect in the sintered magnets. From the macroscopic view the recoil loops bear spring behavior in Nd13.5Fe79.76M0.94B5.8, indicating that the energy barrier could be overcome by the intergranular exchange coupling. From the microcosmic view, the exchange coupling could in

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35

Nayak, Chetan, and Kirill Shtengel. "Microscopic models of two-dimensional magnets with fractionalized excitations." Physical Review B 64, no. 6 (2001). http://dx.doi.org/10.1103/physrevb.64.064422.

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Schellekens, A. J., and B. Koopmans. "Microscopic model for ultrafast magnetization dynamics of multisublattice magnets." Physical Review B 87, no. 2 (2013). http://dx.doi.org/10.1103/physrevb.87.020407.

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37

Zhang, Shunhong, Xiaoyin Li, Huisheng Zhang, Ping Cui, Xiaohong Xu, and Zhenyu Zhang. "Giant Dzyaloshinskii-Moriya interaction, strong XXZ-type biquadratic coupling, and bimeronic excitations in the two-dimensional CrMnI6 magnet." npj Quantum Materials 8, no. 1 (2023). http://dx.doi.org/10.1038/s41535-023-00569-4.

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AbstractTwo-dimensional magnets have been discovered recently as a new class of quantum matter exhibiting a broad wealth of exotic phenomena, including notably various topological excitations rooted in emergent exchange couplings between the localized magnetic moments. By analyzing the anisotropies in the single-ion magnetization and two-body exchange couplings obtained from first-principles calculations, we reveal coexistence of both giant Dzyaloshinskii–Moriya interaction and strong anisotropic XXZ-type biquadratic coupling in a recently predicted monolayer CrMnI6 magnet. The former is induc

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38

Hirosawa, Satoshi, Koki Tokuhara, Shuji Mino, Toshiyuki Matsui, Kenji Morii, and Yutaka Nakayama. "Relations of Corrosion Resistance, Coercivity, and Magnetizability of Modified Nd-Fe-B Sintered Magnets to Their Microstructure." MRS Proceedings 232 (1991). http://dx.doi.org/10.1557/proc-232-275.

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ABSTRACTBrief reviews on corrosion and coercivity mechanisms of sintered Nd-Fe-B magnets are given. Results of recently undertaken transmission electron microscopic study of Nd15 - Fe78-xCoxB7 sintered magnets (x = 3, 6 and 10) are presented. Micro-beam electron diffraction patterns obtained from Nd-Co phases in these magnets could be indexed according only to an orthorhombic cell of Nd3 Co among the binary Nd-Co compounds for x = 3 to 10. Relations of coercivity and magnetizability of this type of magnets to their microstructure are discussed in connection to the effects of V or Mo addition w

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39

Inoue, K., M. Takai, K. IshibashI, Y. Kawata, N. Suzuki, and S. Namba. "0.5 MeV Submicron Ion Probe System for RBS/PIXE." MRS Proceedings 128 (1988). http://dx.doi.org/10.1557/proc-128-381.

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ABSTRACTA nuclear microprobe-forming system for the microscopic RBS/PIXE measurement of micro devices has been developed and installed at the Research Center for Extreme Materials, Osaka University. The use of precision quadrupole magnets and an objective collimator ensures a final spot size of less than 1μm.

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40

Kragskow, Jon G. C., Andrea Mattioni, Jakob K. Staab, Daniel Reta, Jonathan M. Skelton, and Nicholas F. Chilton. "Spin–phonon coupling and magnetic relaxation in single-molecule magnets." Chemical Society Reviews, 2023. http://dx.doi.org/10.1039/d2cs00705c.

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Electron–phonon coupling underlies many physical phenomena, but its microscopic origins are nuanced. This Review derives the spin–phonon interactions in molecules from first principles, and describes an implementation for molecular spin dynamics calculations.

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41

Bedi, Talwinder Singh, Sunil Kumar Paswan, Dhruva Kumar Goyal, and Chitta Ranjan Tripathy. "Experimental study of rectangular-curved magnet–based magnetorheological finishing tool for copper cylindrical workpiece." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, September 28, 2024. http://dx.doi.org/10.1177/09544089241281124.

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A mechanical product with a finely finished surface and accuracy is a great requirement of current industries and individuals because of its enhanced operational life, reliability, smooth interchangeability, and aesthetic appealing features. Therefore, fine-finishing processes are of extensive importance these days. The magnetorheological (MR) finishing processes are developed where the finishing forces provide uniform forces to a magnetorheological polishing fluid which in turn produces a supergrade finishing. In this study, the rectangular-curved magnet–based MR finishing process was used to

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Kurebayashi, Daichi, and Naoto Nagaosa. "Electromagnetic response in spiral magnets and emergent inductance." Communications Physics 4, no. 1 (2021). http://dx.doi.org/10.1038/s42005-021-00765-3.

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AbstractEmergent electromagnetism in magnets originates from the strong coupling between conduction electron spins and those of noncollinear ordered moments and the consequent Berry phase. This offers possibilities to develop new functions of quantum transport and optical responses. The emergent inductance in spiral magnets is an example recently proposed and experimentally demonstrated, using the emergent electric field induced by alternating currents. However, the microscopic theory of this phenomenon is missing, which should reveal factors to determine the magnitude, sign, frequency depende

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43

Busch, Oliver, Börge Göbel, and Ingrid Mertig. "Microscopic origin of the anomalous Hall effect in noncollinear kagome magnets." Physical Review Research 2, no. 3 (2020). http://dx.doi.org/10.1103/physrevresearch.2.033112.

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Kumar, Umesh, Saikat Banerjee, and Shi-Zeng Lin. "Floquet engineering of Kitaev quantum magnets." Communications Physics 5, no. 1 (2022). http://dx.doi.org/10.1038/s42005-022-00931-1.

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AbstractIn recent years, there has been an intense search for materials realizing the Kitaev quantum spin liquid model. A number of edge-shared compounds with strong spin-orbit coupling, such as RuCl3 and iridates, have been proposed to realize this model. Nevertheless, an effective spin Hamiltonian derived from the microscopic model relevant to these compounds generally contains terms that are antagonistic toward the quantum spin liquid. This is consistent with the fact that the zero magnetic field ground state of these materials is generally magnetically ordered. It is a pressing issue to id

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45

Bhardwaj, Anish, Shu Zhang, Han Yan, Roderich Moessner, Andriy H. Nevidomskyy, and Hitesh J. Changlani. "Sleuthing out exotic quantum spin liquidity in the pyrochlore magnet Ce2Zr2O7." npj Quantum Materials 7, no. 1 (2022). http://dx.doi.org/10.1038/s41535-022-00458-2.

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AbstractThe search for quantum spin liquids—topological magnets with fractionalized excitations—has been a central theme in condensed matter and materials physics. Despite numerous theoretical proposals, connecting experiment with detailed theory exhibiting a robust quantum spin liquid has remained a central challenge. Here, focusing on the strongly spin-orbit coupled effective S = 1/2 pyrochlore magnet Ce2Zr2O7, we analyze recent thermodynamic and neutron-scattering experiments, to identify a microscopic effective Hamiltonian through a combination of finite temperature Lanczos, Monte Carlo, a

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46

Schmitt, Maurice, Thibaud Denneulin, András Kovács, et al. "Skyrmionic spin structures in layered Fe5GeTe2 up to room temperature." Communications Physics 5, no. 1 (2022). http://dx.doi.org/10.1038/s42005-022-01031-w.

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AbstractThe role of the crystal lattice, temperature and magnetic field for the spin structure formation in the 2D van der Waals magnet Fe5GeTe2 with magnetic ordering up to room temperature is a key open question. Using Lorentz transmission electron microscopy, we experimentally observe topological spin structures up to room temperature in the metastable pre-cooling and stable post-cooling phase of Fe5GeTe2. Over wide temperature and field ranges, skyrmionic magnetic bubbles form without preferred chirality, which is indicative of centrosymmetry. These skyrmions can be observed even in the ab

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Park, Hyeon-Kyu, Jae-Hyeok Lee, Jehyun Lee, and Sang-Koog Kim. "Optimizing machine learning models for granular NdFeB magnets by very fast simulated annealing." Scientific Reports 11, no. 1 (2021). http://dx.doi.org/10.1038/s41598-021-83315-9.

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AbstractThe macroscopic properties of permanent magnets and the resultant performance required for real implementations are determined by the magnets’ microscopic features. However, earlier micromagnetic simulations and experimental studies required relatively a lot of work to gain any complete and comprehensive understanding of the relationships between magnets’ macroscopic properties and their microstructures. Here, by means of supervised learning, we predict reliable values of coercivity (μ0Hc) and maximum magnetic energy product (BHmax) of granular NdFeB magnets according to their microstr

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Li, Chao-Kai, and Gang Chen. "Universal excitonic superexchange in spin-orbit-coupled Mott insulators." Europhysics Letters, August 2, 2022. http://dx.doi.org/10.1209/0295-5075/ac8612.

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Abstract We point out the universal presence of the excitonic superexchange in spin-orbit-coupled Mott insulators. It is observed that, the restriction to the lowest spin-orbit-entangled "J" states may sometimes be insufficient to characterize the microscopic physics, and the virtual excitonic processes via the upper "J" states provide an important correction to the superexchange. We illustrate this excitonic superexchange from a two-dimensional 5d iridate Sr2IrO4 and explain its physical consequences such as the orbital-like coupling to the external magnetic flux and the nonlinear magnetic su

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Nishino, Masamichi, Hiroshi Hayasaka, and Seiji Miyashita. "Microscopic origin of coercivity enhancement by dysprosium substitution into neodymium permanent magnets." Physical Review B 106, no. 5 (2022). http://dx.doi.org/10.1103/physrevb.106.054422.

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Sim, GiBaik, Frank Pollmann, and Johannes Knolle. "Microscopic details of two-dimensional spectroscopy of one-dimensional quantum Ising magnets." Physical Review B 108, no. 13 (2023). http://dx.doi.org/10.1103/physrevb.108.134423.

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