Journal of Superconductivity and Novel Magnetism最新文献_第5页

Development of Test Setup for I-V Characterization of High-Temperature Superconductor Under Strain 高温超导体应变I-V特性测试装置的研制

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-01-09 DOI: 10.1007/s10948-025-06901-2

A. Anand, Z. Wu, A. S. Gour, T. Kiss, T. S. Datta

{"title":"Development of Test Setup for I-V Characterization of High-Temperature Superconductor Under Strain","authors":"A. Anand, Z. Wu, A. S. Gour, T. Kiss, T. S. Datta","doi":"10.1007/s10948-025-06901-2","DOIUrl":"10.1007/s10948-025-06901-2","url":null,"abstract":"<div>Recently, there has been a focus on the development of power devices using high-temperature superconductors (HTSs) such as superconducting cables, superconducting magnetic energy storage (SMES) systems, superconducting motors, and generators since no joule loss occurs during operation. HTS is said to replace LTS in fusion reactors. Second-generation (2G) HTS has a very thin tape-like composite layered structure. Before the design of devices made out of HTS tape, the electromechanical properties of HTS tape are required. One such property is the I-V characterization of tape under tensile strain. As tape undergoes a state of stress during operation, the knowledge of the degree of degradation of current carrying capacity due to this is of utmost importance. A test setup for I-V characterization under tensile strain is developed by modifying the existing universal testing machine (UTM). This cryogenic UTM (C-UTM) can test stress–strain and I-V characterization of YBCO-based 2G HTS tape under varying strain at 77 K. Experimental procedure and instrumentation are discussed. A SuperPower make 2G HTS tape was tested in this UTM, and the result is compared with the available literature and manufacturer data sheet. This setup will be very helpful for testing the new HTS tape model for which experimental data are not yet present in the literature. A scanning Hall probe microscopy (SHPM) was also utilized to obtain the critical current variation along the length of the deformed test HTS sample. The HTS tape has undergone complete degradation along its length as a result of the applied longitudinal strain.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938744","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

Enhanced Critical Current Density and Flux Pinning in KNbO3: YBCO Nanocomposite Thin Films 提高KNbO3: YBCO纳米复合薄膜的临界电流密度和磁通钉扎

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-01-09 DOI: 10.1007/s10948-024-06842-2

Gaurav Kumar, Neeraj Khare

{"title":"Enhanced Critical Current Density and Flux Pinning in KNbO3: YBCO Nanocomposite Thin Films","authors":"Gaurav Kumar, Neeraj Khare","doi":"10.1007/s10948-024-06842-2","DOIUrl":"10.1007/s10948-024-06842-2","url":null,"abstract":"<div>In this study, we detail the KNbO3:YBCO film deposition process using the pulsed laser deposition (PLD) technique and explore the influence of potassium niobate (KNbO3) nanoparticles (NPs) on pinning characteristics of nanocomposite YBCO films. The XRD investigation confirms the orthorhombic phase of YBCO, and it remains consistent even when NPs are included in the nanocomposites. A Magnetic Property Measurement System (MPMS) is used to measure the magnetic characteristics, applying a field within a range of ± 7 T. The KNbO3:YBCO nanocomposite thin films exhibit higher critical current (Jc) in comparison to YBCO films. Notably, the most substantial improvement, ~ 3.5-fold, in Jc and flux pinning properties is observed in 0.5 wt% KNbO3:YBCO nanocomposite thin films. Furthermore, the investigation reveals that nanocomposite films display a slower rate of Jc decay with the increase of fields as compared to YBCO thin films, indicating improved pinning properties. The results indicate that introducing small KNbO3 nanoparticles in YBCO matrix is an effective way to enhance the in-field performance of YBCO.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938745","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

Modelling of Angular Behaviour of Core Loss in Grain-Oriented Laminations Using the Loss Separation Approach 用损耗分离方法模拟晶粒取向层合中芯损耗角行为

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-01-08 DOI: 10.1007/s10948-024-06876-6

Sai Ram Boggavarapu, Ajay Pal Singh Baghel, Krzysztof Chwastek, Shrikrishna V. Kulkarni, Laurent Daniel, Marcos Flavio de Campos, Ikenna Cajetan Nlebedim

{"title":"Modelling of Angular Behaviour of Core Loss in Grain-Oriented Laminations Using the Loss Separation Approach","authors":"Sai Ram Boggavarapu, Ajay Pal Singh Baghel, Krzysztof Chwastek, Shrikrishna V. Kulkarni, Laurent Daniel, Marcos Flavio de Campos, Ikenna Cajetan Nlebedim","doi":"10.1007/s10948-024-06876-6","DOIUrl":"10.1007/s10948-024-06876-6","url":null,"abstract":"<div>An approach to model the anisotropic behaviour of core losses in grain-oriented laminations that are used in advanced electrical machines and transformers is proposed in this work. Core losses are usually split into static hysteresis loss, classical eddy current loss, and excess loss. The static hysteresis and excess loss components exhibit strongly anisotropic behaviours which at low frequencies may be modelled using the orientation distribution function (ODF) approach. However, the anisotropic behaviour of core losses at higher frequencies is rarely addressed. Therefore, this work aims to offer a method to model the anisotropy of these losses for a wide range of frequencies. This work proposes a modified approach that uses the ODF and the Kondorsky law to compute the core losses accurately in any direction for a wide range of frequencies so that the losses due to different magnetisation processes can be studied separately. The paper also highlights possible causes behind the anisotropic behaviour of the excess loss. The proposed approach is also compared with the original ODF description for modelling the loss behaviour along arbitrary directions. The computed loss-frequency behaviour at different induction levels agrees with measured ones along arbitrary directions. The proposed formulation can be used to estimate the losses of transformers and rotating machines as a function of magnetic field direction and frequency.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938811","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

Magnetic and Physical Properties of Polycrystalline GdNiSi3 Rare Earth Intermetallic Compound 多晶GdNiSi3稀土金属间化合物的磁性和物理性质

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-01-07 DOI: 10.1007/s10948-024-06848-w

Vimaljith A. R, Nallamuthu S

引用次数: 0

Effect of Pinning Size on the Critical Current Density in Superconducting Films with Slightly Distorted Square Arrays of Pinning Sites 钉钉尺寸对钉钉点方形微畸变超导薄膜临界电流密度的影响

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-01-06 DOI: 10.1007/s10948-024-06896-2

Afsaneh Zarei, Mehdi Hosseini, Zahra Owjifard, Ali Moftakharzadeh

引用次数: 0

Magnetic Properties of Rapidly Solidified (Fe1−xNix)88Zr7B4Cu1 Alloys 快速凝固（Fe1−xNix）88Zr7B4Cu1合金的磁性能

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-01-06 DOI: 10.1007/s10948-024-06878-4

Arvindha Babu Diraviam, J. Arout Chelvane, B. S. Murty, Bhaskar Majumdar, Manivel Raja Muthuvel

{"title":"Magnetic Properties of Rapidly Solidified (Fe1−xNix)88Zr7B4Cu1 Alloys","authors":"Arvindha Babu Diraviam, J. Arout Chelvane, B. S. Murty, Bhaskar Majumdar, Manivel Raja Muthuvel","doi":"10.1007/s10948-024-06878-4","DOIUrl":"10.1007/s10948-024-06878-4","url":null,"abstract":"<div>In this report, soft magnetic properties of amorphous and nanocrystalline (Fe1−xNix)88Zr7B4Cu1 alloys with x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 and 1.0 have been studied. The rapidly solidified ribbons have been prepared using a vacuum melt spinning technique followed by annealing for obtaining nanocrystalline phases. The Curie temperature (Tc) of amorphous phase increases with Ni content upto x = 0.6 and decreases beyond x = 0.6. The saturation magnetisation of as-spun and high-temperature (620/720 °C) annealed ribbons of (Fe1−xNix)88Zr7B4Cu1 alloy system shows a dip at around x = 0.35 which is termed as Invar behaviour. However, Invar behaviour is not observed in 450/500 °C annealed ribbons due to the absence of fcc phase which becomes non-magnetic around x = 0.35 and is responsible for the dip in magnetisation. The coercivity of 620/750 °C annealed ribbons is high as compared to as-spun and 450/500 °C annealed ribbons due to the presence of Fe3Zr/Ni5Zr phases.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938759","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

First-Principles Investigation of the Electronic and Magnetic Properties of RhCo-Based Quaternary Heusler Alloys rhco基四元Heusler合金电子和磁性能的第一性原理研究

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-01-06 DOI: 10.1007/s10948-024-06883-7

R. Nourine, S. Abbaoui, M. Caid, H. Rached, D. Rached, Y. Rached, Nada Talal Mahmoud, S. Al-Qaisi

{"title":"First-Principles Investigation of the Electronic and Magnetic Properties of RhCo-Based Quaternary Heusler Alloys","authors":"R. Nourine, S. Abbaoui, M. Caid, H. Rached, D. Rached, Y. Rached, Nada Talal Mahmoud, S. Al-Qaisi","doi":"10.1007/s10948-024-06883-7","DOIUrl":"10.1007/s10948-024-06883-7","url":null,"abstract":"<div>In this contribution, we present an ab initio investigation of the electronic and magnetic properties of some RhCo-based quaternary Heusler alloys (QH). QH compounds can be generated from doping the X2YZ full Heusler alloys; in this case, we start our study by tracking the electronic and magnetic properties variation of cobalt-doped Rh2MnSn. Our results reveal that Co-substitution at Rh sites of Rh2−xCoxMnSn (x = 0 to 2) transforms it into half-metallic material when x ≥ 1. The calculated magnetic moment is 4.68µB for Rh2MnSn (x = 0), this value will increase with Co doping to be an integer 5 µB when x ≥ 1 obeys the Slater Pauling behavior. The spin polarization at the Fermi level varied from 20.76 to 100%. The Curie temperature (Tc) and exchange interaction are largely dependent on the valence electron number (Nv); for this purpose, we also identify some other quaternary RhCoMnZ (Z = Al, Si, Ga, Ge, Sn, Sb) compounds with different Nv. The exchange parameters (jij) and Tc are calculated using the LMTO method. The Tc is calculated with the mean-field approximation (MFA), and the results indicate that all compounds investigated have Tc evidently higher than room temperature making them promising candidates for spintronics applications. The latter results are in better agreement with available experimental and theoretical data.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925601","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

Tunable Magnetic Skyrmion Motion on a Nanostrip Using Current and Spin Waves: A Micromagnetic Study 利用电流和自旋波在纳米带上的可调谐磁激子运动：微磁研究

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-01-03 DOI: 10.1007/s10948-024-06889-1

Payal Bhattacharjee, Saswati Barman

{"title":"Tunable Magnetic Skyrmion Motion on a Nanostrip Using Current and Spin Waves: A Micromagnetic Study","authors":"Payal Bhattacharjee, Saswati Barman","doi":"10.1007/s10948-024-06889-1","DOIUrl":"10.1007/s10948-024-06889-1","url":null,"abstract":"<div>Nowadays, the concept of non-trivial topological protection and the nanoscale size of nanomagnetic particles constitute a major area of research. Due to topological protection stability, nanoscale size, and the requirement of low spin current density for motion, skyrmions have attracted great attention in next-generation spintronic devices as robust information carriers. We study the motion of an isolated magnetic skyrmion with induced interfacial Dzyaloshinskii-Moriya interaction (iDMI) instigated by a spin wave and driven by spin current with variation in different parameters in a nanotrack of finite length using micromagnetic simulations. It is found that the magnetic skyrmion moves in the same direction as the direction of propagation of the spin wave. The skyrmion initially experiences an acceleration in its motion; thereafter, the velocity decreases exponentially. The motion of the magnetic skyrmion initiates as the momentum of the spin wave gets transferred to it. The motion of the magnetic skyrmion is found to be significantly dependent on the variation of parameters like frequency and amplitude of the incident spin waves, as well as the damping parameter and the strength of the applied spin-polarized current. The results obtained in this work could become useful to design skyrmion-based spintronic information-carrying and storage devices.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142913018","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

Study on the Electromagnetic and Microwave Absorption Characteristics of Co(_{2})Si by Non-metallic (B, C) Doping 非金属（B， C）掺杂Co (_{2}) Si的电磁和微波吸收特性研究

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2025-01-03 DOI: 10.1007/s10948-024-06897-1

Jiang Zou, Zehang Zhao, Quan Xie

{"title":"Study on the Electromagnetic and Microwave Absorption Characteristics of Co(_{2})Si by Non-metallic (B, C) Doping","authors":"Jiang Zou, Zehang Zhao, Quan Xie","doi":"10.1007/s10948-024-06897-1","DOIUrl":"10.1007/s10948-024-06897-1","url":null,"abstract":"<div>Mechanical alloying and hot sintering were used to synthesize Co(_{2})Si-doped powder materials with varying boron (B) and carbon (C) ratios. The effect of B and C doping on the magnetic behavior, microwave absorption characteristics, and crystal structure of the materials was systematically investigated. All X-ray diffraction peaks corresponded to the standard card for Co(_{2})Si (ICDD: 98-005-2281). The saturation magnetization (Ms) values for samples doped with 2, 4, and 8 at% B were 14.28, 19.56, and 7.36 emu/g, respectively. The Ms values for the Co(_{2})Si samples doped with 2, 4, and 8 at% C were 16.66, 19.97, and 14.56 emu/g, respectively. Co(_{2})Si alloys with C significantly improved their overall absorption performance. The minimum reflection loss in the C-doped Co(_{2})Si alloy was (-)61.88 dB, accompanied by a bandwidth of 2.38 GHz for effective absorption. Furthermore, the Co(_{2-x})C(_{x})Si samples (where x = 0.04, 0.08, 0.16) exhibited superior comprehensive absorption properties compared to the Co(_{2-x})B(_{x})Si samples.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142913019","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

Valley-Dependent Crossed Andreev Reflection in Graphene/Superconductor/Line-Defect Superlattice Junctions 石墨烯/超导体/线缺陷超晶格结中谷相关交叉Andreev反射

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-30 DOI: 10.1007/s10948-024-06895-3

Chongdan Ren, Yuqiao Ren, Hongyu Tian

{"title":"Valley-Dependent Crossed Andreev Reflection in Graphene/Superconductor/Line-Defect Superlattice Junctions","authors":"Chongdan Ren, Yuqiao Ren, Hongyu Tian","doi":"10.1007/s10948-024-06895-3","DOIUrl":"10.1007/s10948-024-06895-3","url":null,"abstract":"<div>Graphene, a two-dimensional material with remarkable electronic properties, offers significant potential for valley-based electronic devices. In this study, we explore a novel mechanism to achieve valley-dependent, near-perfect crossed Andreev reflection (CAR) in graphene-based junctions by utilizing the valley degree of freedom in a graphene/superconductor/line defect superlattice (LDGSL) structure. The LDGSL introduces unique valley-filtering effects. By incorporating staggered pseudospin potentials and intrinsic spin-orbit coupling in the left graphene electrode, the system selectively enhances CAR for electrons in the K(') valley, while simultaneously suppressing local Andreev reflection and elastic cotunneling (ECT). Numerical simulations reveal that CAR is nearly perfect for K(') valley electrons with spin-up, while for K valley electrons with spin-down, only ECT is observed. Our results demonstrate the viability of this approach for valley-polarized CAR in graphene/ superconductor junctions, providing a pathway for the development of valley-based quantum information devices.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890033","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