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

Anti-site Disorder Driven Unusual Magnetic Properties in Sm( _{2} )NiMnO( _{6} ) Double Perovskite 反位无序驱动的Sm ( _{2} ) NiMnO ( _{6} )双钙钛矿异常磁性

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-23 DOI: 10.1007/s10948-024-06845-z

S. Majumder, S. Saha, M. Tripathi, P. Rajput, S. N. Jha, R. J. Choudhary, D. M. Phase

{"title":"Anti-site Disorder Driven Unusual Magnetic Properties in Sm( _{2} )NiMnO( _{6} ) Double Perovskite","authors":"S. Majumder, S. Saha, M. Tripathi, P. Rajput, S. N. Jha, R. J. Choudhary, D. M. Phase","doi":"10.1007/s10948-024-06845-z","DOIUrl":"10.1007/s10948-024-06845-z","url":null,"abstract":"<div>Cation ordered double perovskite RE(_{2})NiMnO(_{6}) (RE: rare-earth) is commonly believed to show two distinct magnetic phase transitions, one at T = T( _{C} ) because of Ni-O-Mn ferromagnetic (FM) super exchange interaction and another at T = T( _{d} ) due to the polarization of RE spins opposite with respect to Ni-Mn network. In the present work, the structural, electronic, and magnetic properties of anti-site disordered Sm( _{2} )NiMnO( _{6} ) (SNMO) have been investigated. It is observed that the presence of intrinsic B-site disorder results in an additional antiferromagnetic (AFM) coupling, mediated via Ni-O-Ni and Mn-O-Mn local bond pairs. As a consequence, the magnetic behavior of SNMO comprises of co-existing FM-AFM phases. Field-dependent inverted cusp-like trend in temperature-dependent magnetization, thermal irreversibility in cooling-warming paths of susceptibility, two-step reversibility in magnetic isotherm, and non-monotonicity in the thermal evolution of coercivity and remanence indicate the presence of competing magnetic phases over a wide range of temperature values (T( _{d} < ) T < T( _{C} )).</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870459","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

The Influence of the Direction of Dislocation to the External Magnetic Field on the Critical Current Density and Strong Trapping of the Vortex Lattice in NbTi Wires 位错方向对外部磁场对NbTi丝涡流晶格临界电流密度和强俘获的影响

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-23 DOI: 10.1007/s10948-024-06891-7

Daniel Gajda, Andrzej Zaleski

引用次数: 0

Magnetic Phase Diagram of Triangular Lattice Eu-Based Compound EuAg(_{4})Sb(_{2}) 三角形晶格铕基化合物EuAg的磁相图(_{4}) Sb(_{2})

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-21 DOI: 10.1007/s10948-024-06886-4

Shishi Ma, Changbo Zheng, Junbao He, Bo Liu, Sujuan Jin, Chaungchaung Ma, Hui Liang, Congbin Liu, Hao Shi

{"title":"Magnetic Phase Diagram of Triangular Lattice Eu-Based Compound EuAg(_{4})Sb(_{2})","authors":"Shishi Ma, Changbo Zheng, Junbao He, Bo Liu, Sujuan Jin, Chaungchaung Ma, Hui Liang, Congbin Liu, Hao Shi","doi":"10.1007/s10948-024-06886-4","DOIUrl":"10.1007/s10948-024-06886-4","url":null,"abstract":"<div>We conducted a thorough study on the evolution of magnetic properties in the layered triangular lattice Eu-based antimonide EuAg(_{4})Sb(_{2}). The magnetic susceptibility measurements suggest that the title compound experiences two sequential antiferromagnetic transitions at approximately 10.8 K and 7.5 K, respectively, which is in contrast to the dominant ferromagnetic interactions indicated by a positive Curie-Weiss temperature in the paramagnetic region. This suggests the presence of a complex interaction between ferromagnetic and antiferromagnetic exchanges in EuAg(_{4})Sb(_{2}). The magnetic phase diagrams, constructed based on both magnetic susceptibility and isothermal magnetization measurements, provide unequivocal definitions for the various magnetic states observed in EuAg(_{4})Sb(_{2}). Remarkably, an intermediate transition state, accompanied by a 1/3 magnetization-plateau-like anomaly, emerges under in-plane magnetic fields, but missing under out-of-plane magnetic fields. Our result demonstrates that EuAg(_{4})Sb(_{2}) hosts intriguing magnetic properties and could be a promising platform for exploring exotic magnetic properties of Eu(^{2+}) triangular lattice compounds.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859607","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

Magnetism and Critical Behavior of the Fullerene C18 Studied by Monte Carlo simulations 用蒙特卡罗模拟研究富勒烯C18的磁性和临界行为

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-21 DOI: 10.1007/s10948-024-06838-y

S. Idrissi, A. Jabar, L. Bahmad

引用次数: 0

Detailed Analysis of the Superconducting Gap with Dynes Pair-Breaking Scattering 超导间隙与Dynes破对散射的详细分析

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-20 DOI: 10.1007/s10948-024-06844-0

Anastasiya Lebedeva, František Herman

{"title":"Detailed Analysis of the Superconducting Gap with Dynes Pair-Breaking Scattering","authors":"Anastasiya Lebedeva, František Herman","doi":"10.1007/s10948-024-06844-0","DOIUrl":"10.1007/s10948-024-06844-0","url":null,"abstract":"<div>We study the energy gap within the Dynes superconductor theory. This model generalizes the Bardeen-Cooper-Schrieffer (BCS) approach by including the pair-breaking scattering, introducing the tunneling in-gap states up to a Fermi level. We analytically solve the energy gap equation in various limit cases. The solution provides simple tools for further studies, compared to more complex numerics, and highlights the basic characteristics of the theory. First, in the critical limit of pair-breaking scattering, we derive an analytical form of zero-temperature gap to transition temperature ratio. Next, we derive the dependence of the energy gap close to critical temperature and look at its behavior for general and critical pair-breaking scattering rate. Furthermore, we compare our result with the numerical solution of the gap equation assuming general temperature. We show the range of temperatures, for which the analytical approximation is valid. In the end, we provide the approximative formula of the gap, assuming general pair-breaking scattering, emphasizing its exact behavior close to transition temperature.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-024-06844-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859549","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

On the Lineshapes of Temperature-Dependent Transport Measurements of Superconductors Under Pressure 论压力下超导体随温度变化的传输测量线形

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-19 DOI: 10.1007/s10948-024-06879-3

Alexander C. Mark, Russell J. Hemley

引用次数: 0

Effect of Phase Transition Type on the Magnetocaloric Effect and Magnetic Hysteresis in Er(Co1-xMnx)2 Laves Alloys 相变类型对Er(Co1-xMnx)2合金磁热效应和磁滞的影响

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-18 DOI: 10.1007/s10948-024-06888-2

H. Y. Dai, Z. H. Zu, Y. K. Chu, R. J. Cui, Z. D. Han

{"title":"Effect of Phase Transition Type on the Magnetocaloric Effect and Magnetic Hysteresis in Er(Co1-xMnx)2 Laves Alloys","authors":"H. Y. Dai, Z. H. Zu, Y. K. Chu, R. J. Cui, Z. D. Han","doi":"10.1007/s10948-024-06888-2","DOIUrl":"10.1007/s10948-024-06888-2","url":null,"abstract":"<div>As magnetic refrigerants, first-order transition (FOT) and second-order transition (SOT) materials possess distinct advantages and disadvantages. If the phase transition can be tuned to the critical point between FOT and SOT, it may be possible to combine the benefits of both, thereby achieving an outstanding magnetocaloric effect. Here, we demonstrated this approach through phase transition engineering in Er(Co1-xMnx)2 alloys. When x ≤ 0.06, the magnetic phase transition of the samples was FOT, exhibiting a significant magnetic entropy change. However, at x = 0.08, the samples underwent a SOT from ferromagnetic to paramagnetic, leading to a substantial reduction in the magnetocaloric effect. At the critical point of the FOT/SOT border with x = 0.06, the sample exhibited a large magnetic entropy change along with negligible magnetic hysteresis. This work demonstrates that the critical point between FOT and SOT is an effective means of achieving an excellent magnetocaloric effect.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844831","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

Strain and Exchange Bias-Enabled Field-Free Voltage-Controlled Magnetic Anisotropy Switching 应变和交换偏置使能无场电压控制磁各向异性开关

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-18 DOI: 10.1007/s10948-024-06873-9

Pinkesh Kumar Mishra, Swapnil Bhuktare

{"title":"Strain and Exchange Bias-Enabled Field-Free Voltage-Controlled Magnetic Anisotropy Switching","authors":"Pinkesh Kumar Mishra, Swapnil Bhuktare","doi":"10.1007/s10948-024-06873-9","DOIUrl":"10.1007/s10948-024-06873-9","url":null,"abstract":"<div>In pursuing energy-efficient and high-performance nonvolatile magnetic memory devices, this study explores voltage-induced techniques, specifically voltage-controlled magnetic anisotropy (VCMA), as an alternative to current-induced methods, which suffer from Ohmic loss. The perpendicular magnetic anisotropy (PMA) nanomagnet, known for its superior stability and scalability compared to in-plane variants, VCMA switching in PMA system requires an in-plane symmetry breaking field, which limits its practicality for on-chip applications. We investigate field-free VCMA switching utilizing strain from a piezoelectric layer and an exchange bias from an antiferromagnetic material. Using macro-spin simulations based on the Landau-Lifshitz-Gilbert equation, we systematically analyze how the VCMA effect, strain-induced magnetoelastic effect, exchange bias, oxide and free layer thicknesses, and damping constant affect the switching performance of the device. The write error rate (WER) drops drastically from 0.2 (without stress) to ({10}^{-6}) (100 MPa stress), showcasing the effectiveness of our approach. We also find that the damping constant, especially in the 0.01–0.05 range, plays a crucial role in further optimizing the switching performance of the device. This study offers new insights for enhancing magnetic memory technology.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844832","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

Low Temperature Variation of Superfluid Phase Stiffness in the Presence of Two Mutually Exclusive Orderings 存在两种互斥排序时超流体相刚性的低温变化

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-18 DOI: 10.1007/s10948-024-06872-w

Doyel Rakshit, Ajay Kumar Ghosh

引用次数: 0

Effect of the Solidification Rate on the Magnetic and Magnetocaloric Properties of NiMnIn Heusler Alloy: Second-Order Magnetic Transition 凝固速率对NiMnIn Heusler合金磁性和磁热性能的影响：二阶磁转变

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-17 DOI: 10.1007/s10948-024-06857-9

Milad Arman, Farzad Shahri, Reza Gholamipour, Sajad Sohrabi

{"title":"Effect of the Solidification Rate on the Magnetic and Magnetocaloric Properties of NiMnIn Heusler Alloy: Second-Order Magnetic Transition","authors":"Milad Arman, Farzad Shahri, Reza Gholamipour, Sajad Sohrabi","doi":"10.1007/s10948-024-06857-9","DOIUrl":"10.1007/s10948-024-06857-9","url":null,"abstract":"<div>This work attempted to study the effects of the solidification behavior on the magnetic and magnetocaloric properties of stoichiometric Ni50Mn34In16 Heusler alloy. In this respect, the samples with two different diameters of 2 mm (D2 sample) and 8 mm (D8 sample) were prepared by suction casting technique. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and magnetic force microscopy (MFM) were employed to identify the structure, microstructure, and magnetic domain distribution of the samples. Also, phase transformation behavior was characterized using differential scanning calorimetry (DSC) across a temperature range of 200–350 K. Thermo-magnetic properties of samples were evaluated using SQUID Quantum Design MPMS®3 during heating and cooling at the temperature range of 175–350 K at the constant magnetic field of 2 T. Moreover, the magnetic and magnetocaloric properties of the samples were analyzed using the cryostat-equipped VSM around the magnetic phase transition temperature under a magnetic field up to 1.75 T. Based on the results obtained, it is shown that an increase in the sample diameter leads to an increase in the Curie temperature. Furthermore, it was concluded that the magnetocaloric properties such as magnetic entropy change ((Delta {S}_{text{M}})), adiabatic temperature change ((Delta {T}_{text{ad}})), and refrigerant capacity ((RC)) parameters improved with an increase in the sample diameter through the microstructural refinement and enhancing the atomic ordering. Specifically, the maximum values of the (Delta {S}_{text{M}}), (RC), and (Delta {T}_{text{ad}}) for the D8 sample are estimated to be 3.04 J/kg K, 109.83 J/kg, and 0.94 K, respectively.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845092","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