Journal of Superconductivity and Novel Magnetism最新文献_第10页

Exploring the Effect of La Substitution on Magnetic and Electrical Behavior of DyFeO3 探索La取代对DyFeO3磁性和电学行为的影响

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-04-15 DOI: 10.1007/s10948-025-06967-y

S. Shravan Kumar Reddy, S. Shanmukharao Samatham, T. Sowmyya, M. Sreenath Reddy, G. R. Turpu, Ch. Gopal Reddy, P. Yadagiri Reddy, V. Raghavendra Reddy

{"title":"Exploring the Effect of La Substitution on Magnetic and Electrical Behavior of DyFeO3","authors":"S. Shravan Kumar Reddy, S. Shanmukharao Samatham, T. Sowmyya, M. Sreenath Reddy, G. R. Turpu, Ch. Gopal Reddy, P. Yadagiri Reddy, V. Raghavendra Reddy","doi":"10.1007/s10948-025-06967-y","DOIUrl":"10.1007/s10948-025-06967-y","url":null,"abstract":"<div>Structural, electrical, magnetic, and 57Fe Mössbauer studies on lanthanum (La)-doped DyFeO3 (Dy1-xLaxFeO3) are reported in this paper. X-ray diffraction measurements confirm the lattice expansion with La doping. Raman spectroscopic studies give insights into the doping of La into Dy in DyFeO3. The temperature-dependent magnetization studies of samples show that there is a shift in the spin-reorientation transition temperature (TSR) towards the lower temperatures with the increase of La-doping concentration for pure DyFeO3 (DFO), Dy0.8La0.2FeO3 (La2), and Dy0.6La0.4FeO3 (La4) samples which could be due to the weakening of Fe3+-Dy3+ exchange interaction. Isothermal magnetization data and magnetically split sextet 57Fe Mossbauer spectra of all the samples confirm the presence of antiferromagnetic ordering at room temperature. In addition, the observed magnetization data of LaFeO3 (x = 1.0) sample indicates the presence of spin-glasslike behavior. It is also observed that with the increase of La doping, porosity increases resulting in the enhancement of leakage current density. Ohmic and space charge limited conduction (SCLC) mechanisms explain the conduction mechanism present in the samples.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydride Superconductivity: Here to Stay, or to Lead Astray and Some Day Go Away? 氢化物超导：继续存在，还是走向歧途，终有一天会消失？

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-04-15 DOI: 10.1007/s10948-025-06972-1

J. E. Hirsch

引用次数: 0

Observations of the Novel Low-Field Microwave Absorption in ZnxCo1-xFe2-xAlxO4 Ferrites ZnxCo1-xFe2-xAlxO4铁氧体新型低场微波吸收的观察

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-04-11 DOI: 10.1007/s10948-025-06954-3

S. J. C. Masuku, J. Z. Msomi, T. S. Mahule, V. V. Srinivasu

{"title":"Observations of the Novel Low-Field Microwave Absorption in ZnxCo1-xFe2-xAlxO4 Ferrites","authors":"S. J. C. Masuku, J. Z. Msomi, T. S. Mahule, V. V. Srinivasu","doi":"10.1007/s10948-025-06954-3","DOIUrl":"10.1007/s10948-025-06954-3","url":null,"abstract":"<div>Nanocrystalline ZnxCo1-xFe2-xAlxO4 with particle sizes between 6 and 13 nm were synthesized by glycol-thermal reaction under a low reaction temperature of 200 °C. XRD analysis confirmed the cubic spinel phase with no impurity phases of the as prepared compounds. Raman active photon modes observed also confirmed ferrite crystal lattice. Direct TEM measurements of particle sizes relate well with XRD data and reveal nearly spherical-shaped particle images. Electron spin resonance analysis shows the novel low-field microwave absorptions (LFMA) for the as-prepared (6 ≤ D ≤ 13 nm) compounds recorded at about zero fields. Similar signals have been observed for similar compounds produced by standard ceramic process, confirming reproducibility. The area of the LFMA signals increases with increasing Zn2+ and Al3+ concentrations and their orientations change with particle size. The presence of LFMA signals makes compounds investigated suitable for applications in low magnetic field sensors, magnetic field-controlled absorbers, spin valves, etc.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-025-06954-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Computational Insights into the Magnetocaloric Effect and Magnetic Properties of Gd(_3)In Compound for Magnetic Refrigeration Applications Gd (_3)在磁制冷应用中的磁热效应和磁性质的计算见解

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-04-10 DOI: 10.1007/s10948-025-06970-3

H. Kerrai, E. M. Jalal, H. Saadi, M. Salama, M. Kerouad, A. Zaim

{"title":"Computational Insights into the Magnetocaloric Effect and Magnetic Properties of Gd(_3)In Compound for Magnetic Refrigeration Applications","authors":"H. Kerrai, E. M. Jalal, H. Saadi, M. Salama, M. Kerouad, A. Zaim","doi":"10.1007/s10948-025-06970-3","DOIUrl":"10.1007/s10948-025-06970-3","url":null,"abstract":"<div>This manuscript investigates the magnetocaloric effect and magnetic properties of the Gd(_3)In compound as functions of magnetic field and temperature using a mean-field approximation. We first introduce the model and methodology, followed by the determination of the transition temperature through the analysis of magnetization, susceptibility, and magnetic entropy change ((-Delta S_m)). Our temperature-dependent magnetization analysis reveals a second-order phase transition from the ferromagnetic (FM) to the paramagnetic (PM) phase at 208 K, consistent with previous theoretical and experimental findings. The maximum magnetic entropy change ((-Delta S_m^{text {max}})) is 6.46 J/kg.K at 208 K under a 5 T magnetic field, with a corresponding relative cooling power (RCP) of 680.11 J/kg. Additionally, hysteresis behavior is observed at various temperatures. These findings suggest that Gd(_3)In is a promising candidate for magnetic refrigeration applications.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction: Effect of Barium Hexaferrites and Thermally Reduced Graphene Oxide on EMI Shielding Properties in Polymer Composites 更正：六铁氧体钡和热还原氧化石墨烯对聚合物复合材料中电磁干扰屏蔽性能的影响

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-04-10 DOI: 10.1007/s10948-025-06965-0

Khadija Zubair, M. Fayzan Shakir, Ayesha Afzal, Z. A. Rehan, Yasir Nawab

引用次数: 0

The Perovskites MSnO3 (M = Mg, Ca): Ab Initio Investigation of Structural, Electronic, Thermodynamic, and Thermoelectric Characteristics 钙钛矿MSnO3 (M = Mg, Ca)：结构、电子、热力学和热电特性的从头算研究

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-04-10 DOI: 10.1007/s10948-025-06959-y

Y. El-harrar, R. Masrour, M. Hamedoun, J. Kharbach, A. Rezzouk, N. Benzakour, K. Bouslykhane

{"title":"The Perovskites MSnO3 (M = Mg, Ca): Ab Initio Investigation of Structural, Electronic, Thermodynamic, and Thermoelectric Characteristics","authors":"Y. El-harrar, R. Masrour, M. Hamedoun, J. Kharbach, A. Rezzouk, N. Benzakour, K. Bouslykhane","doi":"10.1007/s10948-025-06959-y","DOIUrl":"10.1007/s10948-025-06959-y","url":null,"abstract":"<div>This paper introduces an ab initio theoretical investigation employing the Full-Potential Linear Augmented Plane Wave (FP-LAPW) method grounded in Density Functional Theory (DFT). The aim is to ascertain the structural and electronic characteristics of the perovskite compounds MgSnO3 and CaSnO3. The calculation of structural and electronic properties involved employing the Generalized Gradient Approximation (GGA) for exchange–correlation energy. Through the minimization of energy with respect to volume using the Murnaghan equation of state, the study derived the equilibrium lattice parameter and cohesive properties of the compound. The analysis of the electronic structure was centered on examining the electronic density of states (DOS). Density Functional Theory (DFT) was employed to calculate the pressure and temperature-dependent variations in specific heat, entropy, and Debye temperature. The equation of state, implemented through the GIBBS program based on the quasi-harmonic Debye model, facilitated these computations. Notably, a specific heat behavior of Cv≈Cp was identified at temperatures below T = 300 K, surpassing Dulong-Petit limit values reported for simple perovskites. Furthermore, thermoelectric properties were assessed using the Boltzmann transport theory in the BoltzTraP code.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Long-Range Superconducting Transition Limited by Phase Slip or Vortex Glass Phase in SmFe1-xCoxAsO Polycrystalline Thin Films SmFe1-xCoxAsO多晶薄膜中受相滑移或涡玻璃相限制的远程超导转变

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-04-07 DOI: 10.1007/s10948-025-06949-0

K. Aguilar-Mendoza, A. Guillen-Cervantes, I. Corrales-Mendoza, A. Conde-Gallardo

{"title":"Long-Range Superconducting Transition Limited by Phase Slip or Vortex Glass Phase in SmFe1-xCoxAsO Polycrystalline Thin Films","authors":"K. Aguilar-Mendoza, A. Guillen-Cervantes, I. Corrales-Mendoza, A. Conde-Gallardo","doi":"10.1007/s10948-025-06949-0","DOIUrl":"10.1007/s10948-025-06949-0","url":null,"abstract":"<div>The resistive transition, under an external magnetic field, was measured for two SmFe1-xCoxAsO superconducting films with different quality of intergranular coupling. It is observed that the sample with a low density of intergranular coupling has a semiconducting character and the transition to the long-range superconducting state is controlled by the thermal activated phase slip of the order parameter, described by the Ambegaokar-Halperin model. While in the sample with an intergranular coupling characterized by metallic connectivity, it is the freezing of the vortex lines into a vortex glass phase that controls the transition to the long-range superconducting state. A true superconducting state is observed only in the sample that shows a vortex glass phase. In contrast, in the sample in which the resistivity in the normal state indicates a semiconducting granular coupling, a broad transition that does not reach the zero-resistance state occurs. In fact, in this last sample at high applied fields, the long-range superconducting state is not reached because the intergranular coupling is broken, and the resistive signal associated with the thermal activated flux creep of the bulk vortices becomes dominant.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-025-06949-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, Mechanical, Optoelectronic, Magnetic and Thermodynamic Properties of GdM2 (M = Fe, Co, Ni) for Optoelectronic Applications 光电子应用中GdM2 （M = Fe, Co, Ni）的结构、机械、光电、磁和热力学性质

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-04-07 DOI: 10.1007/s10948-025-06971-2

Boudjelal Zegaou, Mohammed El Amine Monir, Bendoukha Abdelkarim Reguig, M. Fatmi, Munirah D. Albaqami, Saikh Mohammad, Mika Sillanpää

{"title":"Structural, Mechanical, Optoelectronic, Magnetic and Thermodynamic Properties of GdM2 (M = Fe, Co, Ni) for Optoelectronic Applications","authors":"Boudjelal Zegaou, Mohammed El Amine Monir, Bendoukha Abdelkarim Reguig, M. Fatmi, Munirah D. Albaqami, Saikh Mohammad, Mika Sillanpää","doi":"10.1007/s10948-025-06971-2","DOIUrl":"10.1007/s10948-025-06971-2","url":null,"abstract":"<div>The structural, mechanical, optoelectronic, magnetic, and thermodynamic properties of the intermetallic compounds GdM₂ (M = Fe, Co, Ni) have been investigated using the full-potential linear muffin-tin orbital (FP-LMTO) method within the local spin density approximation (LSDA) and LSDA + U approaches. In the ferromagnetic phase, both functionals were employed to account for the Coulomb repulsion among electrons of the same atom through the Hubbard U term. These methods were specifically applied to describe the Gd–4f electrons in the electronic and magnetic calculations of ferromagnetic Laves-phase GdM₂ (M = Fe, Co, Ni). Our findings reveal that the LSDA + U approach provides the most stable phase for all the studied compounds. The elastic constant C44 C_{44}C44 indicates that resistance to unidirectional compression is greater than resistance to shear deformation. While LSDA accurately reproduces experimental lattice constants, LSDA + U slightly overestimates them. However, LSDA + U delivers a more precise description of the band structure, density of states, and magnetic moments compared to LSDA. Additionally, a stronger hybridization interaction is observed between Gd-d and Ni-d electrons compared to Gd-d and Co-d, with the weakest interaction occurring between Gd-d and Fe-d electrons. The calculated lattice parameters for GdFe₂, GdCo₂, and GdNi₂ deviate from experimental values by only 0.3%, 0.4%, and 0.2%, respectively, demonstrating a high degree of accuracy. A critical pressure of 10 GPa was found for GdNi₂, indicating a relatively low pressure is needed to transition from the ferromagnetic phase to a non-magnetic state. The calculated total magnetic moments range from approximately 6.5 μB to 7.2 μB per formula unit, with the LSDA + U method providing a more accurate description of the magnetic ordering.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Computational Investigation for Physical Property and Superconductive Nature of CaRh2Si2 And SrCo2Si2 by DFT Simulation CaRh2Si2和SrCo2Si2物理性质和超导性质的DFT模拟计算研究

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-04-03 DOI: 10.1007/s10948-025-06966-z

Kaushik Das, Mohammad Mohsin, Mirza Intisar Anan, Pran Gopal Datta, Md. Atikur Rahman, Mohammad Abdul Alim

{"title":"A Computational Investigation for Physical Property and Superconductive Nature of CaRh2Si2 And SrCo2Si2 by DFT Simulation","authors":"Kaushik Das, Mohammad Mohsin, Mirza Intisar Anan, Pran Gopal Datta, Md. Atikur Rahman, Mohammad Abdul Alim","doi":"10.1007/s10948-025-06966-z","DOIUrl":"10.1007/s10948-025-06966-z","url":null,"abstract":"<div>This research focuses on the mechanical, electronic, optical, and superconductive nature of CaRh2Si2 and SrCo2Si2, which have structures similar to those of the ThCr2Si2 compound. The investigation used a first-principles approach based on DFT, with calculations performed via CASTEP. The optimized lattice parameters closely match previously synthesized parameters. These materials possess positive elastic constants, which ensure they are mechanically stable. Additionally, Pugh’s and Poisson’s ratio values suggest that CaRh2Si2 and SrCo2Si2 exhibit brittle behavior. At the Fermi level, the valence and conduction bands overlap, indicating the metallic characteristics of both compounds. Various optical properties were investigated, with the reflectance parameter demonstrating that CaRh2Si2 and SrCo2Si2 have the potential to be effective solar reflectors. The photoconductive nature and absorption parameters begin when the photon’s energy is zero, confirming these material’s metallic characteristics. The thermodynamic properties of CaRh2Si2 and SrCo2Si2 were derived from their elastic stiffness constants, and the Debye temperatures of these two compounds are 576.08 K and 446 K, respectively, based on the elastic constants data. In BCS (Bardeen-Cooper-Schrieffer) theory, superconductivity occurs when electrons form Cooper pairs at low temperatures due to attractive forces mediated by phonons. The superconducting properties suggest that CaRh2Si2 and SrCo2Si2 moderately coupled superconductors. The outcomes of this study could serve as an adequate basis for further investigations.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Finite Element Analysis of the Temperature Evolution of Bi-2223 Stacked Conductors Under Overcurrent Operation 过流作用下Bi-2223堆叠导体温度演化的有限元分析

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-04-03 DOI: 10.1007/s10948-025-06931-w

Yu Wang, Lijun Cai, Run Wu, Yunpeng Zhu, Xinbo Hu, Jian Liu, Xiaguang Sun

{"title":"Finite Element Analysis of the Temperature Evolution of Bi-2223 Stacked Conductors Under Overcurrent Operation","authors":"Yu Wang, Lijun Cai, Run Wu, Yunpeng Zhu, Xinbo Hu, Jian Liu, Xiaguang Sun","doi":"10.1007/s10948-025-06931-w","DOIUrl":"10.1007/s10948-025-06931-w","url":null,"abstract":"<div>The high-temperature superconductor (HTS) has important application prospects in the field of nuclear fusion. In the high-field large magnets, it is inevitable to be affected by the fault current impact. Under such extreme conditions, superconducting magnet systems will face quench problems and generate large AC loss. AC loss can cause the temperature to rise, which worsens the quench environment. Under the inrush currents, the analysis of the temperature rise pattern of the HTS plays a crucial role regarding the safe operation of the magnet system. In this paper, Comsol’s two-dimensional H method and heat transfer module are used to simulate AC loss and the temperature variation of Bi-2223 HTS conductor for different conditions under the impact of fault current. The temperature can reach up to 81.8 K, 85.2 K, and 90.7 K when the inrush current is 10 kA, 15 kA, and 20 kA, respectively, with a constant flat-topping time of 0.2 s and a ramp-up rate of 100 kA/s. The inrush current is 10 kA, and the flat-top time is 0.2 s, 0.4 s, and 0.6 s, and then, the maximum temperature can reach 81.7 K, 82.5 K, and 83.4 K, respectively. The result shows that as the peak value of the inrush current and the duration of the peak hold time increase, the AC loss and temperature of the HTS conductor increase. As the number of conductor slots increases, the temperature decreases significantly.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0