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Journal articles on the topic 'Lanthanum ferrite'

Author: Grafiati
Published: 21 February 2023

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1

Zhang, Chang Sen, and Leia Yang. "Microstructure and Magnetic Properties of La-Doped Barium-Ferrite." Advanced Materials Research 668 (March 2013): 706–9. http://dx.doi.org/10.4028/www.scientific.net/amr.668.706.

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The La-doped barium ferrites microparticles were successful synthesized by citrate sol-gel method. The structure, morphology and magnetic properties of the ferrite were characterized by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), differential thermal analysis (TG-DSC) and superconducting quantum interference device (SQUID). The results showed that the average crystallite size of La-doped barium-ferrite decreased with increasing La content. The morphology of the barium ferrite was spherical particles; however, doped lanthanum, barium ferrite changed into laminated structure. In addition, doping lanthanum improved the magnetic properties of the ferrite. The saturation magnetization (Ms) of La-doped M-type barium ferrite 67.70emu/g, it was greater than the non-doped M-type barium ferrite 57.45emu/g.
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2

Wang, Zi Min, and Shi Qiang Jiang. "Calcium Lanthanum Permanent Magnetic Ferrite Coupled with Soft Magnetic Ferrite." Advanced Materials Research 311-313 (August 2011): 1309–13. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1309.

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This paper introduces the production method of calcium lanthanum permanent magnetic ferrite coupled with soft magnetic ferrite components. This type of calcium lanthanum permanent magnetic ferrite has excellent magnetic properties. Soft magnetic ferrite components (CoFe2O4) can be coupled effectively with permanent magnetic ferrite (the main ingredients: Ca0.548Sr0.120La0.542Fe12O19) by adding the additives (SrB2Si0.67O5.34 and CaSiO3), which can promote the sintering of the liquid permanent magnetic ferrite. This calcium lanthanum permanent magnetic ferrite can be significantly improved in the microstructure, density, magnetic properties.
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3

Taufiqu Rochman, Nurul, and Wisnu Ari Adi. "Analysis of Structural and Microstructure of Lanthanum Ferrite by Modifying Iron Sand for Microwave Absorber Material Application." Advanced Materials Research 896 (February 2014): 423–27. http://dx.doi.org/10.4028/www.scientific.net/amr.896.423.

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Analysis crystal structure of lanthanum ferrite by modifying iron sand has been carried out. Lanthanum ferrite included one of the functional materials which had composition of ABO3perovskite system. The lanthanum ferrite is prepared by iron sand and lanthanum oxide powders. The mixture was milled for 10h with the various composition of lanthanum content. The samples are sintered at a temperature of 1000 °C for 10h. The microstructure analyses showed that the particle shapes was polygonal with the varied particle sizes and uniform distribution on the surface of the sample. The phase composition of refinement result showed that the lanthanum ferrite formed empirical compound of La0.8Mg0.2Fe0.7Ti0.2Si0.1O3. The La0.8Mg0.2Fe0.7Ti0.2Si0.1O3phase has a structure orthorombic (P b n m) with lattice parameters a = 5.513(1) Å, b = 5.549(1) Å and c = 7.849(2) Å, α = β = γ = 90°, the unit cell volume of V = 240.2(9) Å3, and the atomic density of ρ = 6.293 gr/cm3. We concluded that this study has been successfully synthesized lanthanum ferrite material from modifying iron sand and has been understood changes in the parameters of the crystal structure and phase composition of this material. It was a great opportunity that the material can be used as a material candidate of absorber electromagnetic waves.
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4

Gupta, Meenal, Anusree Das, Dipankar Das, Satyabrata Mohapatra, and Anindya Datta. "Chemical Synthesis of Rare Earth (La, Gd) Doped Cobalt Ferrite and a Comparative Analysis of Their Magnetic Properties." Journal of Nanoscience and Nanotechnology 20, no. 8 (August 1, 2020): 5239–45. http://dx.doi.org/10.1166/jnn.2020.18528.

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Lanthanum (La) and gadolinium (Gd) doped cobalt ferrite nanoparticles are synthesized using a soft chemical approach. The analysis of these ferrites using X-ray diffraction (XRD) and transmission electron microscopy (TEM) shows that lattice spacing decreases in the doped ferrite samples. Magnetization data indicates towards the decrease of saturation magnetisation but increase in coercivity with doping. Mössbauer spectroscopy measurements at room temperature indicate increased occupancy of trivalent cations at tetrahedral site. The addition of rare earth dopants reduces the hard-magnetic character of cobalt ferrite.
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5

Kikuchi, Takeyuki, Tatsuya Nakamura, Masamichi Miki, Makoto Nakanishi, Tatsuo Fujii, Jun Takada, and Yasunori Ikeda. "Synthesis of Hexagonal Ferrites by Citric Complex Method." Advances in Science and Technology 45 (October 2006): 697–700. http://dx.doi.org/10.4028/www.scientific.net/ast.45.697.

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Various hexagonal ferrites, which include hard and soft ferrites, were prepared by citric complex method. High purity reagent of strontium carbonate, iron (III) nitrate ennnahydrate, cobalt (II) nitrate hexahydrate and lanthanum oxide were used as starting materials. Prepared aqueous solution was heated for dehydration and gelling. Thermal pyrolysis was carried out by heating the gel. The obtained precursor powders were ground with an alumina mortar and compacted by uniaxial pressing into disk specimens and then heated at temperature range between 1023K and 1523K in air. Phase identification and determination of lattice parameters were carried out by powder X-ray diffraction. Scanning Electron Microscope was utilized to investigate the microstructure of the polycrystalline ferrites. Magnetic properties were discussed by magnetization measurements by using a vibration sample magnetometer. Magnetization and coercive force were measured. In the case of M-type ferrite, M-type barium and strontium ferrites were formed at vary low temperature relative to by conventional synthesis. The lanthanum and cobalt substituted M-type strontium ferrite ultra fine powders prepared by citric complex method showed extremely large coercive force.
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6

Sorlateap, Sitthisak, and Wirunya Keawwattana. "Preparation and Magnetic Properties of La Substituted Barium Ferrites Synthesized by the Oxide one Pot Synthesis (OOPS) Process." Advanced Materials Research 634-638 (January 2013): 2250–53. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.2250.

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Lanthanum (La) substituted barium ferrite, Ba1-xLaxFe12O19(x=0.00-0.40) has been synthesized by the oxide one pot synthesis (OOPS) process. The crystalline structure and magnetic properties have been investigated by means of XRD, SEM and VSM. The XRD pattern matched with the barium ferrite structure. The saturation magnetization (Ms) and coercive field (Hc) of ferrites increased by substitution of La ions on Ba sites at the content up to x=0.15 and then decrease.
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7

Abdulameer Abbas, Hayder, Adnan Hussein Ali, and Ban Mohammad Hasan. "Morphology and magnetic properties of lanthanum (La3+) substituted manganese, chromium nano ferrites." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 2 (June 1, 2019): 1102. http://dx.doi.org/10.11591/ijpeds.v10.i2.pp1102-1109.

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<span>Several studies have been carried out to investigate the effect of Lanthanum (La<sup>3+</sup>) ion substitution on the structural and magnetic properties of manganese-chromium (Mn-Cr) ferrite of chemical formula Mn La<sub>x</sub>Cr Fe<sub>2</sub>O<sub>4</sub>(x=0.0, 0.25 and 0.5). Such studies have made efforts to improve the magnetic and structural properties of manganese-chromium (Mn-Cr) ferrite by using lanthanum substituted nano ferrites and then synthesized using the sol-gel method and annealed at a temperature of 700<sup>o</sup>C. The changes that occurred in the structure of the nano ferrites as a result of lanthanum substitution were identified using X-ray diffraction (XRD). Based on Debye-Scherrer equation, the XRD data were used in measuring the particle sizes of different diffraction and average crystallite size by means of Fourier Transform infrared spectroscopy (FTIR). In analyzing the morphology of the nano ferrites, scanning electron microscopy (SEM) was used, elemental compassion was studied using energy dispersive X-ray spectroscopy (EDAX), and the average particle diameter was determined using Transmission electron microscopy (TEM) studies. FTIR spectral analysis of the prepared samples under investigations revealed the formation of a single phase spherical particles. Two important absorption bands were observed; one (<em>ν<sub>1</sub></em>) around 556 cm<sup>-1</sup>, which is attributed to the intrinsic vibrations of tetrahedral complexes, while the other low frequency band (<em>ν<sub>2</sub></em>) was around 430 cm<sup>-1</sup>, and attributed to octahedral complexes.</span>
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8

Simner, S. P., J. F. Bonnett, N. L. Canfield, K. D. Meinhardt, J. P. Shelton, V. L. Sprenkle, and J. W. Stevenson. "Development of lanthanum ferrite SOFC cathodes." Journal of Power Sources 113, no. 1 (January 2003): 1–10. http://dx.doi.org/10.1016/s0378-7753(02)00455-x.

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9

Pérez-Ramírez, Javier, and Bent Vigeland. "Lanthanum ferrite membranes in ammonia oxidation." Catalysis Today 105, no. 3-4 (August 2005): 436–42. http://dx.doi.org/10.1016/j.cattod.2005.06.057.

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10

Syed, Komal, Jiayue Wang, Bilge Yildiz, and William J. Bowman. "Bulk and surface exsolution produces a variety of Fe-rich and Fe-depleted ellipsoidal nanostructures in La0.6Sr0.4FeO3 thin films." Nanoscale 14, no. 3 (2022): 663–74. http://dx.doi.org/10.1039/d1nr06121f.

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11

Andoulsi, R., K. Horchani-Naifer, and M. Férid. "Preparation of lanthanum ferrite powder at low temperature." Cerâmica 58, no. 345 (March 2012): 126–30. http://dx.doi.org/10.1590/s0366-69132012000100020.

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Single lanthanum ferrite phase was successfully prepared at low processing temperature using the polymerizable complex method. To implement this work, several techniques such as differential scanning calorimetry, X-ray diffraction, Fourier Transform Infrared Spectroscopy, scanning electron microscopy and BET surface area measurements were used. Throw the obtained results, it was shown that steps of preparing the powder precursor and temperature of its calcination are critical parameters for avoiding phase segregation and obtaining pure lanthanum ferrite compound. Thus, a single perovskite phase was obtained at 600 °C. At this temperature, the powder was found to be fine and homogeneous with an average crystallite size of 13 nm and a specific surface area of 12.5 m².g-1.
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12

Price, Patrick M., Ellen Rabenberg, David Thomsen, Scott T. Misture, and Darryl P. Butt. "Phase Transformations in Calcium-Substituted Lanthanum Ferrite." Journal of the American Ceramic Society 97, no. 7 (March 26, 2014): 2241–48. http://dx.doi.org/10.1111/jace.12891.

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13

Andoulsi-Fezei, Refka, Nasr Sdiri, Karima Horchani-Naifer, and Mokhtar Férid. "Dielectric properties of calcium-substituted lanthanum ferrite." Journal of Asian Ceramic Societies 8, no. 1 (January 2, 2020): 94–105. http://dx.doi.org/10.1080/21870764.2019.1709693.

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14

Wang, Mengmeng, Naizhi Li, Qing Shen, Zhongliang Zhan, and Chusheng Chen. "A highly efficient and stable perovskite cathode with in situ exsolved NiFe alloy nanoparticles for CO2 electrolysis." Sustainable Energy & Fuels 6, no. 8 (2022): 2038–44. http://dx.doi.org/10.1039/d2se00225f.

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15

Aziz, Hafiz Sartaj, Saadia Rasheed, Rafaqat Ali Khan, Abdur Rahim, Jan Nisar, Syed Mujtaba Shah, Farasat Iqbal, and Abdur Rahman Khan. "Evaluation of electrical, dielectric and magnetic characteristics of Al–La doped nickel spinel ferrites." RSC Advances 6, no. 8 (2016): 6589–97. http://dx.doi.org/10.1039/c5ra20981a.

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16

Iida, K., Y. Minachi, K. Masuzawa, M. Kawakami, H. Nishio, and H. Taguchi. "Hgh-Performance Ferrite Magnets: M-Type Sr-Ferrite Containing Lanthanum and Cobalt." Journal of the Magnetics Society of Japan 23, no. 4−2 (1999): 1093–96. http://dx.doi.org/10.3379/jmsjmag.23.1093.

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17

Riedl, Christoph, Matthäus Siebenhofer, Andreas Nenning, Gernot Friedbacher, Maximilian Weiss, Christoph Rameshan, Johannes Bernardi, et al. "Performance modulation through selective, homogenous surface doping of lanthanum strontium ferrite electrodes revealed by in situ PLD impedance measurements." Journal of Materials Chemistry A 10, no. 6 (2022): 2973–86. http://dx.doi.org/10.1039/d1ta08634k.

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The polarization resistance of lanthanum strontium ferrite thin film electrodes with and without additional Pt surface doping was compared directly after film growth by PLD employing in situ electrochemical impedance spectroscopy.
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18

Bichurin, M. I., and V. M. Petrov. "Modeling of Magnetoelectric Interaction in Magnetostrictive-Piezoelectric Composites." Advances in Condensed Matter Physics 2012 (2012): 1–12. http://dx.doi.org/10.1155/2012/798310.

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The paper dwells on the theoretical modeling of magnetoelectric (ME) effect in layered and bulk composites based on magnetostrictive and piezoelectric materials. Our analysis rests on the simultaneous solution of elastodynamic or elastostatic and electro/magnetostatic equations. The expressions for ME coefficients as the functions of material parameters and volume fractions of components are obtained. Longitudinal, transverse, and in-plane cases are considered. The use of the offered model has allowed to present the ME effect in ferrite cobalt-barium titanate, ferrite cobalt-PZT, ferrite nickel-PZT, and lanthanum strontium manganite-PZT composites adequately.
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19

Nielsen, Jimmi, Eivind M. Skou, and Torben Jacobsen. "Oxygen Sorption and Desorption Properties of Selected Lanthanum Manganites and Lanthanum Ferrite Manganites." ChemPhysChem 16, no. 8 (March 17, 2015): 1635–45. http://dx.doi.org/10.1002/cphc.201500025.

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20

Borgekov, Daryn B., Artem L. Kozlovskiy, Rafael I. Shakirzyanov, Ainash T. Zhumazhanova, Maxim V. Zdorovets, and Dmitriy I. Shlimas. "Properties of Perovskite-like Lanthanum Strontium Ferrite Ceramics with Variation in Lanthanum Concentration." Crystals 12, no. 12 (December 9, 2022): 1792. http://dx.doi.org/10.3390/cryst12121792.

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The purpose of this work is to study the effect of lanthanum (La) concentration on the phase formation, conductivity, and thermophysical properties of perovskite-like strontium ferrite ceramics. At the same time, the key difference from similar studies is the study of the possibility of obtaining two-phase composite ceramics, the presence of various phases in which will lead to a change in the structural, strength, and conductive properties. To obtain two-phase composite ceramics by mechanochemical solid-phase synthesis, the method of the component molar ratio variation was used, which, when mixed, makes it possible to obtain a different ratio of elements and, as a result, to vary the phase composition of the ceramics. Scanning electron microscopy, X-ray phase analysis, and impedance spectroscopy were used as research methods, the combination of which made it possible to comprehensively study the properties of the synthesized ceramics. Analysis of phase changes depending on lanthanum concentration change can be written as follows: (La0.3Sr0.7)2FeO4/LaSr2Fe3O8 → (La0.3Sr0.7)2FeO4/LaSr2Fe3O8/Sr2Fe2O5 → (La0.3Sr0.7)2FeO4/Sr2Fe2O5. Results of impedance spectroscopy showed that with an increase in lanthanum concentration from 0.10 to 0.25 mol in the synthesized ceramics, the value of the dielectric permittivity increases significantly from 40.72 to 231.69, the dielectric loss tangent increases from 1.07 to 1.29 at a frequency of 10,000 Hz, and electrical resistivity decreases from 1.29 × 108 to 2.37 × 107 Ω∙cm.
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21

Coffey, Gregory W., John S. Hardy, Larry R. Pederson, Peter C. Rieke, and Edwin C. Thomsen. "Oxygen Reduction Activity of Lanthanum Strontium Nickel Ferrite." Electrochemical and Solid-State Letters 6, no. 6 (2003): A121. http://dx.doi.org/10.1149/1.1568174.

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22

WANG, W., and M. MOGENSEN. "High-performance lanthanum-ferrite-based cathode for SOFC." Solid State Ionics 176, no. 5-6 (February 14, 2005): 457–62. http://dx.doi.org/10.1016/j.ssi.2004.09.007.

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23

Петухова, Э. А., В. В. Хартон, and В. В. Кведер. "Эффекты памяти и нелинейная электропроводность легированного перовскитоподобного ферритов лантана-стронция La-=SUB=-0.5-=/SUB=-Sr-=SUB=-0.5-=/SUB=-Fe-=SUB=-0.75-=/SUB=-Al-=SUB=-0.2-=/SUB=-Ni-=SUB=-0.05-=/SUB=-O-=SUB=-3-delta-=/SUB=-." Физика твердого тела 65, no. 1 (2023): 63. http://dx.doi.org/10.21883/ftt.2023.01.53924.475.

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Analysis of the existence of memory phenomena in model heterostructures based on doped ferrite La0.5Sr0.5Fe0.75Al0.2Ni0.05O3-δ with a perovskite structure has been carried out. It was demonstrated that one 5-10 μm thick ferrite layer sandwiched between Pt and Ni electrodes exhibits an analog memristor behavior. Under positive polarity, this heterostructure shows a smooth increase in electrical conductivity, with an opposite effect under negative polarity. Such phenomena are presumably associated with changing local concentrations of oxygen vacancies due to their drift in the electric field. Since lanthanum-strontium ferrites are sufficiently tolerant with respect to oxygen non-stoichiometry variations, no dendrite growth due to reductive decomposition is observed. The current vs. voltage dependencies display a strong nonlinearity resulting the Poole-Frenkel effect, namely, a decrease in the activation energy of electron holes trapped on oxygen vacancies. In addition to the Poole-Frenkel effect, pre-exponential factor of the conductivity vs. temperature dependence also increases under electric field, indicating an increase in the effective electron-hole mobility.
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24

Götsch, Thomas, Norbert Köpfle, Matthias Grünbacher, Johannes Bernardi, Emilia A. Carbonio, Michael Hävecker, Axel Knop-Gericke, et al. "Crystallographic and electronic evolution of lanthanum strontium ferrite (La0.6Sr0.4FeO3−δ) thin film and bulk model systems during iron exsolution." Physical Chemistry Chemical Physics 21, no. 7 (2019): 3781–94. http://dx.doi.org/10.1039/c8cp07743f.

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We study the changes in the crystallographic phases and in the chemical states during the iron exsolution process of lanthanum strontium ferrite (LSF, La0.6Sr0.4FeO3−δ).
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25

Owolabi, Taoreed O., Tawfik A. Saleh, Olubosede Olusayo, Miloud Souiyah, and Oluwatoba Emmanuel Oyeneyin. "Modeling the Specific Surface Area of Doped Spinel Ferrite Nanomaterials Using Hybrid Intelligent Computational Method." Journal of Nanomaterials 2021 (August 18, 2021): 1–13. http://dx.doi.org/10.1155/2021/9677423.

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Spinel ferrites nanomaterials are magnetic semiconductors with excellent chemical, magnetic, electrical, and optical properties which have rendered the materials useful in many technological driven applications such as solar hydrogen production, data storage, magnetic sensing, converters, inductors, spintronics, and catalysts. The surface area of these nanomaterials contributes significantly to their targeted applications as well as the observed physical and chemical features. Experimental doping has shown a great potential in enhancing and tuning the specific surface area of spinel ferrite nanomaterials while the attributed experimental challenges call for viable theoretical model that can estimate the surface area of doped spinel ferrite nanomaterials with high degree of precision. This work develops stepwise regression (STWR) and hybrid genetic algorithm-based support vector regression (GBSVR) intelligent model for estimating specific surface area of doped spinel ferrite nanomaterials using lattice parameter and the size of nanoparticle as descriptors to the models. The developed hybrid GBSVR model performs better than STWR model with the performance improvement of 7.51% and 22.68%, respectively, using correlation coefficient and root mean square error as performance metrics when validated with experimentally measured specific surface area of doped spinel ferrite nanomaterials. The developed GBSVR model investigates the influence of nickel, yttrium, and lanthanum nanoparticles on the specific surface area of different classes of spinel ferrite nanomaterials, and the obtained results agree excellently well with the measured values. The accuracy and precision characterizing the developed model would be of immense importance in enhancing specific surface area of doped spinel ferrite nanomaterial prediction with circumvention of experimental stress coupled with reduced cost.
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26

Gaikwad, Vishwajit M., and Smita A. Acharya. "Novel perovskite–spinel composite approach to enhance the magnetization of LaFeO3." RSC Advances 5, no. 19 (2015): 14366–73. http://dx.doi.org/10.1039/c4ra11619d.

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In the present work, the perovskite–spinel interface effect on the bulk magnetic behavior of lanthanum ferrite (LaFeO3) based composite systems is under investigation in view of the enhancement of the magnetization of LaFeO3.
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27

Bhargav, K. K., S. Ram, and S. B. Majumder. "Physics of the multi-functionality of lanthanum ferrite ceramics." Journal of Applied Physics 115, no. 20 (May 28, 2014): 204109. http://dx.doi.org/10.1063/1.4879899.

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28

Simner, S. P., J. F. Bonnett, N. L. Canfield, K. D. Meinhardt, V. L. Sprenkle, and J. W. Stevenson. "Optimized Lanthanum Ferrite-Based Cathodes for Anode-Supported SOFCs." Electrochemical and Solid-State Letters 5, no. 7 (2002): A173. http://dx.doi.org/10.1149/1.1483156.

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29

Götsch, Thomas, Corsin Praty, Matthias Grünbacher, Lukas Schlicker, Maged F. Bekheet, Andrew Doran, Aleksander Gurlo, et al. "Iron Exsolution Phenomena in Lanthanum Strontium Ferrite SOFC Anodes." ECS Transactions 78, no. 1 (May 30, 2017): 1327–41. http://dx.doi.org/10.1149/07801.1327ecst.

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30

Di Bartolomeo, Elisabetta, Francesca Zurlo, Andrea Marcucci, and Silvia Licoccia. "Pd-Doped Lanthanum Strontium Ferrite as Promising Reversible Electrode." ECS Transactions 91, no. 1 (July 10, 2019): 1949–51. http://dx.doi.org/10.1149/09101.1949ecst.

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31

Berchmans, L. John, V. Leena, K. Amalajyothi, S. Angappan, and A. Visuvasam. "Preparation of Lanthanum Ferrite Substituted with Mg and Ca." Materials and Manufacturing Processes 24, no. 5 (May 2009): 546–49. http://dx.doi.org/10.1080/10426910902746739.

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32

Leng, Jing, Shuang Li, Zhongshan Wang, Yanfeng Xue, and Dapeng Xu. "Synthesis of ultrafine lanthanum ferrite (LaFeO3) fibers via electrospinning." Materials Letters 64, no. 17 (September 2010): 1912–14. http://dx.doi.org/10.1016/j.matlet.2010.06.005.

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33

Yadav, Avadhesh Kumar, Rajneesh Kumar Singh, and Prabhakar Singh. "Fabrication of lanthanum ferrite based liquefied petroleum gas sensor." Sensors and Actuators B: Chemical 229 (June 2016): 25–30. http://dx.doi.org/10.1016/j.snb.2016.01.066.

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34

Popa, Monica, and Jose M. Calderon Moreno. "Lanthanum ferrite ferromagnetic nanocrystallites by a polymeric precursor route." Journal of Alloys and Compounds 509, no. 10 (March 2011): 4108–16. http://dx.doi.org/10.1016/j.jallcom.2010.12.162.

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35

Ranieri, M. G. A., M. Cilense, E. C. Aguiar, C. C. Silva, A. Z. Simões, and E. Longo. "Electrical behavior of chemically grown lanthanum ferrite thin films." Ceramics International 42, no. 2 (February 2016): 2234–40. http://dx.doi.org/10.1016/j.ceramint.2015.10.016.

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36

Bhargav, K. K., S. Ram, and S. B. Majumder. "Small polaron conduction in lead modified lanthanum ferrite ceramics." Journal of Alloys and Compounds 638 (July 2015): 334–43. http://dx.doi.org/10.1016/j.jallcom.2015.02.186.

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37

Sharma, Rimi, S. Bansal, and Sonal Singhal. "Augmenting the catalytic activity of CoFe2O4 by substituting rare earth cations into the spinel structure." RSC Advances 6, no. 75 (2016): 71676–91. http://dx.doi.org/10.1039/c6ra14325c.

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The current research work evaluates significant enhancement in photo-Fenton activity of pristine cobalt ferrite (CoFe2O4) by inserting very small quantity of rare earth cations such as cerium (Ce3+) and lanthanum (La3+) into its spinel structure.
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38

Dumitru, Raluca, Sorina Negrea, Adelina Ianculescu, Cornelia Păcurariu, Bogdan Vasile, Adrian Surdu, and Florica Manea. "Lanthanum Ferrite Ceramic Powders: Synthesis, Characterization and Electrochemical Detection Application." Materials 13, no. 9 (April 29, 2020): 2061. http://dx.doi.org/10.3390/ma13092061.

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The perovskite-type lanthanum ferrite, LaFeO3, has been prepared by thermal decomposition of in situ obtained lanthanum ferrioxalate compound precursor, LaFe(C2O4)3·3H2O. The oxalate precursor was synthesized through the redox reaction between 1,2-ethanediol and nitrate ion and characterized by chemical analysis, infrared spectroscopy, and thermal analysis. LaFeO3 obtained after the calcination of the precursor for at least 550–800 °C/1 h have been investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). A boron-doped diamond electrode (BDD) modified with LaFeO3 ceramic powders at 550 °C (LaFeO3/BDD) by simple immersion was characterized by cyclic voltammetry and tested for the voltammetric and amperometric detection of capecitabine (CCB), which is a cytostatic drug considered as an emerging pollutant in water. The modified electrode exhibited a complex electrochemical behaviour by several redox systems in direct relation to the electrode potential range. The results obtained by cyclic voltammetry (CV), differential-pulsed voltammetry (DPV), and multiple-pulsed amperometry proved the electrocatalytic effect to capecitabine oxidation and reduction and allowed its electrochemical detection in alkaline aqueous solution.
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39

Striker, Todd, and James A. Ruud. "Effect of Fuel Choice on the Aqueous Combustion Synthesis of Lanthanum Ferrite and Lanthanum Manganite." Journal of the American Ceramic Society 93, no. 9 (April 14, 2010): 2622–29. http://dx.doi.org/10.1111/j.1551-2916.2010.03799.x.

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40

Irfan, Syed, Guang-xing Liang, Fu Li, Yue-xing Chen, Syed Rizwan, Jingcheng Jin, Zheng Zhuanghao, and Fan Ping. "Effect of Graphene Oxide Nano-Sheets on Structural, Morphological and Photocatalytic Activity of BiFeO3-Based Nanostructures." Nanomaterials 9, no. 9 (September 19, 2019): 1337. http://dx.doi.org/10.3390/nano9091337.

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Photocatalysts are widely used for the elimination of organic contaminants from waste-water and H2 evaluation by water-splitting. Herein, the nanohybrids of lanthanum (La) and selenium (Se) co-doped bismuth ferrites with graphene oxide were synthesized. A structural analysis from X-ray diffraction confirmed the transition of phases from rhombohedral to the distorted orthorhombic. Scanning electron microscopy (SEM) revealed that the graphene nano-sheets homogenously covered La–Se co-doped bismuth ferrites nanoparticles, particularly the (Bi0.92La0.08Fe0.50Se0.50O3–graphene oxide) LBFSe50-G sample. Moreover, the band-gap nanohybrids of La–Se co-doped bismuth ferrites were estimated from diffuse reflectance spectra (DRS), which showed a variation from 1.84 to 2.09 eV, because the lowering of the band-gap can enhance photocatalytic degradation efficiency. Additionally, the photo-degradation efficiencies increased after the incorporation of graphene nano-sheets onto the La–Se co-doped bismuth ferrite. The maximum degradation efficiency of the LBFSe50-G sample was up to 80%, which may have been due to reduced band-gap and availability of enhanced surface area for incoming photons at the surface of the photocatalyst. Furthermore, photoluminescence spectra confirmed that the graphene oxide provided more electron-capturing sites, which decreased the recombination time of the photo-generated charge carriers. Thus, we can propose that the use of nanohybrids of La–Se co-doped bismuth ferrite with graphene oxide nano-sheets is a promising approach for both water-treatment and water-splitting, with better efficiencies of BiFeO3.
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41

Boateng, Isaac W., Richard Tia, Evans Adei, Nelson Y. Dzade, C. Richard A. Catlow, and Nora H. de Leeuw. "A DFT+U investigation of hydrogen adsorption on the LaFeO3(010) surface." Physical Chemistry Chemical Physics 19, no. 10 (2017): 7399–409. http://dx.doi.org/10.1039/c6cp08698e.

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Lanthanum ferrite (LaFeO3) is a technologically important electrode material for nickel–metal hydride batteries, energy storage and catalysis. In the present study, we have employed spin-polarized density functional theory calculations, with the Hubbard U correction (DFT+U), to unravel the adsorption mechanism of H2 on the LaFeO3(010) surface.
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42

Yu, Ting-Fang, Che-Wei Chang, Po-Wen Chung, and Yu-Chuan Lin. "Unsupported and silica-supported perovskite-type lanthanum manganite and lanthanum ferrite in the conversion of ethanol." Fuel Processing Technology 194 (November 2019): 106117. http://dx.doi.org/10.1016/j.fuproc.2019.06.001.

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43

Raza, Waseem, Ghulam Nabi, Asim Shahzad, Nafisa Malik, and Nadeem Raza. "Electrochemical performance of lanthanum cerium ferrite nanoparticles for supercapacitor applications." Journal of Materials Science: Materials in Electronics 32, no. 6 (February 20, 2021): 7443–54. http://dx.doi.org/10.1007/s10854-021-05457-w.

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44

García, Fabiana E., Marta I. Litter, and Isabella Natali Sora. "Assessment of the Arsenic Removal From Water Using Lanthanum Ferrite." ChemistryOpen 10, no. 8 (August 2021): 790–97. http://dx.doi.org/10.1002/open.202100065.

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45

Humayun, Muhammad, Habib Ullah, Muhammad Usman, Aziz Habibi-Yangjeh, Asif Ali Tahir, Chundong Wang, and Wei Luo. "Perovskite-type lanthanum ferrite based photocatalysts: Preparation, properties, and applications." Journal of Energy Chemistry 66 (March 2022): 314–38. http://dx.doi.org/10.1016/j.jechem.2021.08.023.

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46

Zhang, Jin, Yu Min Zhang, Chang Yi Hu, Zhong Qi Zhu, and Qing Ju Liu. "A Formaldehyde Gas Sensor Based on Zinc Doped Lanthanum Ferrite." Advanced Materials Research 873 (December 2013): 304–10. http://dx.doi.org/10.4028/www.scientific.net/amr.873.304.

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The gas-sensing properties of zinc doped lanthanum ferrite (Zn-LaFeO3) compounds for formaldehyde were investigated in this paper. Zn-LaFeO3 powders were prepared using sol-gel method combined with microwave chemical synthesis. The powders were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively. The formaldehyde gas-sensing characteristics for the sample were examined. The experimental results indicate that the sensor based on the sample Zn-LaFeO3 shows excellent gas-sensing properties to formaldehyde gas. At the optimal operating temperature of 250°C, the sensitivity of the sensor based on LaFe0.7Zn0.3O3 to 100ppm formaldehyde is 38, while to other test gases, the sensitivity is all lower than 20. The response and recovery times for the sample to formaldehyde gas are 100s and 100s, respectively.
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47

Desai, P., and Anjali Athawale. "Microwave Combustion Synthesis of Silver Doped Lanthanum Ferrite Magnetic Nanoparticles." Defence Science Journal 63, no. 3 (May 16, 2013): 285–91. http://dx.doi.org/10.14429/dsj.63.2387.

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48

Søgaard, Martin, Peter Vang Hendriksen, and Mogens Mogensen. "Oxygen nonstoichiometry and transport properties of strontium substituted lanthanum ferrite." Journal of Solid State Chemistry 180, no. 4 (April 2007): 1489–503. http://dx.doi.org/10.1016/j.jssc.2007.02.012.

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49

Demirci, Ç. E., P. K. Manna, Y. Wroczynskyj, S. Aktürk, and J. van Lierop. "Lanthanum ion substituted cobalt ferrite nanoparticles and their hyperthermia efficiency." Journal of Magnetism and Magnetic Materials 458 (July 2018): 253–60. http://dx.doi.org/10.1016/j.jmmm.2018.03.024.

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50

Tien, Nguen An, I. Ya Mittova, M. V. Knurova, V. O. Mittova, Nguen Thi Min Thu, and Hoang Chan Ngok Bik. "Sol-gel preparation and magnetic properties of nanocrystalline lanthanum ferrite." Russian Journal of General Chemistry 84, no. 7 (July 2014): 1261–64. http://dx.doi.org/10.1134/s1070363214070020.

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