Journal of Superconductivity and Novel Magnetism最新文献_第3页

The Transport AC Losses of YGdBCO-coated Conductors with Periodic Micro-Hole Arrays 具有周期性微孔阵列的 YGdBCO 涂层导体的传输交流损耗

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-16 DOI: 10.1007/s10948-024-06874-8

Mingjiang Wang, Jiangtao Shi, Lihua Jin, Qingyang Wang, Yong Zhao

{"title":"The Transport AC Losses of YGdBCO-coated Conductors with Periodic Micro-Hole Arrays","authors":"Mingjiang Wang, Jiangtao Shi, Lihua Jin, Qingyang Wang, Yong Zhao","doi":"10.1007/s10948-024-06874-8","DOIUrl":"10.1007/s10948-024-06874-8","url":null,"abstract":"<div>The critical current density (Jc) of Y0.5Gd0.5Ba2Cu3O7-x (YGdBCO)-coated conductors (CCs) could be improved via producing the periodic micro-hole arrays on the surface of CCs. In this work, the influence of micro-hole arrays on the transport AC losses of YGdBCO CCs was studied. The micro-hole arrays were produced in YGdBCO CCs via laser drilling, which were distributed with different spacings (l) between two neighboring micro-holes along longitudinal and transverse directions. With l ≥ 0.7 × 0.7 mm, the critical current (Ic) values of drilled samples were nearly identical with that of virgin one. However, a considerable nonlinear decrease of Ic value was displayed in the drilled samples with l < 0.7 × 0.7 mm. In addition, compared to the virgin one, the AC losses of samples drilled with various transverse and longitudinal spacings were increased more than one order of magnitude under low frequency (31 Hz ~ 177 Hz). There was almost no effect on the AC losses of micro-holes spacing for drilled CCs. A 3D H-formulation simulation model was established to analyze the experimental results. The investigations revealed the magnetic flux densities around micro-holes were altered, which could potentially lead to an increase of AC loss.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826304","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

Growth of High Quality Bi(_2)Sr(_2)CaCu(_2)O(_{8+delta }) Single Crystals with a High Critical Temperature of 96 K Using Alumina Crucible 使用氧化铝坩埚生长临界温度高达 96 K 的高质量 Bi(_2)Sr(_2)CaCu(_2)O(_{8+delta }) 单晶体

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-16 DOI: 10.1007/s10948-024-06864-w

Gourav Vaid, Atharv Sawant, Neeraj K. Rajak, D. Jaiswal-Nagar

{"title":"Growth of High Quality Bi(_2)Sr(_2)CaCu(_2)O(_{8+delta }) Single Crystals with a High Critical Temperature of 96 K Using Alumina Crucible","authors":"Gourav Vaid, Atharv Sawant, Neeraj K. Rajak, D. Jaiswal-Nagar","doi":"10.1007/s10948-024-06864-w","DOIUrl":"10.1007/s10948-024-06864-w","url":null,"abstract":"<div>The growth of the high-T(_c) cuprate Bi(_2)Sr(_2)CaCu(_2)O(_{8+delta }) (BSCCO-2212) superconductor is always challenging due to the contamination from alumina crucible or the intergrowth of other phases such as Bi(_2)Sr(_2)CuO(_{6+ delta }) (Bi-2201). In this work, we report the synthesis of single crystals of BSCCO-2212 with the highest reported superconducting transition temperature, T(_c), of 96.6 K, achieved using an improved self-flux technique. The as-grown crystals were characterized by scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDS), and powder x-ray diffraction (p-XRD) measurements. PXRD on single crystals reveals the absence of contamination from the alumina crucible as well as the absence of the intergrowth of Bi-2201 phase. PXRD on crushed single crystals reveals minimal intergrowth of Bi-2201 and Bi-2223 phases. The physical properties were investigated by carrying out temperature-dependent magnetization and resistance measurements. Magnetization measurements revealed the T(_c) of three single crystals of BSCCO-2212 to be 93 K, 94 K, and 96.6 K, higher than the previously reported values in the range from (sim ) 90 to 93 K [1,2,3,4,5]. Such a high T(_c) and the absence of an intergrowth phase indicates a good quality of the grown crystals that can be utilized for fundamental as well as basic research.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826161","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

Density of States in the Heterostructure Ferromagnetic Insulator-Superconductor-Ferromagnetic Insulator

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-14 DOI: 10.1007/s10948-024-06860-0

D. V. Seleznev, S. S. Seidov, N. G. Pugach, D. G. Bezymiannykh, S. I. Mukhin, B. G. L’vov

引用次数: 0

A (^{151})Eu Mössbauer investigation of Magnetic Ordering in the Topological Material Candidate EuZnBi(_2)

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-13 DOI: 10.1007/s10948-024-06887-3

D. H. Ryan

引用次数: 0

Influence of Particle Orientation Angle and Axial Diameter Ratio on the Magnetic Properties of Soft Magnetic Composites by Finite Element Method

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-13 DOI: 10.1007/s10948-024-06856-w

Shen Wu, Zhenzhen Dong, Xiaoran Sun, Xiangkui Zhou, Jianglei Fan, Ying Li, Xin Li, Shizhong Wei

{"title":"Influence of Particle Orientation Angle and Axial Diameter Ratio on the Magnetic Properties of Soft Magnetic Composites by Finite Element Method","authors":"Shen Wu, Zhenzhen Dong, Xiaoran Sun, Xiangkui Zhou, Jianglei Fan, Ying Li, Xin Li, Shizhong Wei","doi":"10.1007/s10948-024-06856-w","DOIUrl":"10.1007/s10948-024-06856-w","url":null,"abstract":"<div>In this paper, a microscopic model of anisotropic soft magnetic composites based on three-dimensional homogeneous distribution is established with numerical calculation. The effects of the particle orientation angle and the axial diameter ratio on the equivalent permeability of composites were investigated by the finite element method, and the accuracy of the model was verified by using experimental results in comparison with the simulation results. The results show that the composites have the largest equivalent permeability of 63.944 when the particle orientation angle is 0° (particle size of 75 µm). As the insulating layer is consistent, the larger equivalent permeability of composites is obtained by the larger particle axial diameter ratio. The equivalent permeability of composites is 114.07 when the axial diameter ratio is 100, which is 89.76% larger than that of the composites with an axial diameter ratio of 5. The equivalent permeability of the specimen with the orientation angle of 0° and the particle axial diameter ratio of 42 is 48.579, and the equivalent permeability of the model under the same conditions is 47.276 in the simulation. The comparative analysis found that the simulation and experiment value only have an error of 2.68%, which is within the acceptable range and further proves the accuracy of this model.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811267","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 Unexpected Shape Effects on Magnetic Properties of Films of Nanometer Thickness and Micrometer Extension

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-13 DOI: 10.1007/s10948-024-06839-x

G. P. Fuentes, D. B. O. Silva, L. K. C. S. Assis, L. A. P. Gonçalves, E. Padrón-Hernández

{"title":"The Unexpected Shape Effects on Magnetic Properties of Films of Nanometer Thickness and Micrometer Extension","authors":"G. P. Fuentes, D. B. O. Silva, L. K. C. S. Assis, L. A. P. Gonçalves, E. Padrón-Hernández","doi":"10.1007/s10948-024-06839-x","DOIUrl":"10.1007/s10948-024-06839-x","url":null,"abstract":"<div>The analysis of ferromagnetic resonance (FMR) through micromagnetic simulations is a powerful tool used to gain insight into the effects of shape on magnetization dynamics. Mathematical models incorporated into simulation programs have greatly facilitated the understanding of resulting magnetic behaviors. The present study aimed to investigate the influence of shape on the magnetization dynamics of Permalloy discs and stadium-like geometries of finite dimensions. The finite element numerical method was used to perform simulations, employing the Nmag simulator. To simulate the FMR spectra, the ringdown method was utilized, a common technique in computational micromagnetism. Resonance modes were identified using Fourier transform analysis. The novelty of this work is to demonstrate that in a film with a thickness of 50 nm and lateral dimensions less than 1000 nm, it cannot be considered as an infinite film. The results of the calculations showed that, for an in-plane field in a Py disk with these dimensions, there are resonance fields affected when the geometry is slightly stretched. This phenomenon was observed applying a field parallel to the plane of a stadium-shaped geometry. The effects of shape anisotropy remain relevant even in a 50 nm film with lateral dimensions exceeding 1000 nm. The aim of the study is to review results that are normally used for work with thin films. Assuming infinite dimensions and disregarding shape effects always requires care, since depending on the study in question, artifacts due to the shape effect may arise and be interpreted incorrectly.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811268","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 Effects of Thermomagnetic Treatment on the Magnetic Properties of Nanocrystalline Fe–O and Fe-Co–O Pressed Compacts

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-13 DOI: 10.1007/s10948-024-06837-z

A. S. Lileev, J. Kargin, Y. V. Konyukhov, D. G. Zhukov, H. Sanchez Cornejo, Ji Won Seo, S. N. Holmes, J. Albino Aguiar, C. H. W. Barnes, L. De Los Santos Valladares

{"title":"The Effects of Thermomagnetic Treatment on the Magnetic Properties of Nanocrystalline Fe–O and Fe-Co–O Pressed Compacts","authors":"A. S. Lileev, J. Kargin, Y. V. Konyukhov, D. G. Zhukov, H. Sanchez Cornejo, Ji Won Seo, S. N. Holmes, J. Albino Aguiar, C. H. W. Barnes, L. De Los Santos Valladares","doi":"10.1007/s10948-024-06837-z","DOIUrl":"10.1007/s10948-024-06837-z","url":null,"abstract":"<div>The influence of thermal and thermomagnetic treatment on the magnetic properties of iron—cobalt oxides compacts fabricated by powder metallurgy is studied. The influence of magnetic pulse processing (MPP) on the formation of the phase composition and magnetic properties of nanocrystalline α-Fe (50%) + Fe2O3 (50%); α-Fe (50%) + Fe2O3 (40%) + Co3O4 (10%) and α-Fe (50%) + Fe2O3 (30%) + Co3O4 (20%) pressed powder compacts during synthesis in a high-energy mill and subsequent annealing have been investigated. According to the X-ray diffraction analysis, annealing α-Fe (50%) + Fe2O3 (50%) pressed samples at 250 ℃ in air, promotes the oxidation of α-Fe and FeO to magnetite (Fe3O4). Additional annealing of the compact in vacuum at 250 ℃ increases its remnant magnetization and magnetic anisotropy. Whereas, increasing the concentration of Co3O4 oxide has no strong effect on the coercivity and residual magnetization of the compacts. Eventually, thermomagnetic treatment of the α-Fe (50%) + Fe2O3 (30%) + Co3O4 (20%) system does not improve its magnetic properties.</div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-024-06837-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142821472","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

Investigation of Aging Effects on Superconducting Properties of BiS2-based Compounds: First 12-Year Restudy

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-12 DOI: 10.1007/s10948-024-06863-x

Poonam Rani, Rajveer Jha, V. P. S. Awana, Yoshikazu Mizuguchi

引用次数: 0

Anisotropy of Resistance and Magnetoresistance of Pr0.5Nd0.5BaMn2O6 Single Crystal with Partial A-Site Ordering

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-11 DOI: 10.1007/s10948-024-06841-3

Elena V. Mostovshchikova, Sergey V. Naumov, Timofey N. Pavlov, Anton Stepanov

引用次数: 0

Magnetic Layered MAOX Phases: DFT Screening of the Magnetic and Electronic Properties

IF 1.6 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2024-12-11 DOI: 10.1007/s10948-024-06835-1

Natalia G. Zamkova, Vyacheslav S. Zhandun, Oksana N. Draganyuk

{"title":"Magnetic Layered MAOX Phases: DFT Screening of the Magnetic and Electronic Properties","authors":"Natalia G. Zamkova, Vyacheslav S. Zhandun, Oksana N. Draganyuk","doi":"10.1007/s10948-024-06835-1","DOIUrl":"10.1007/s10948-024-06835-1","url":null,"abstract":"<div>In this manuscript we study the magnetic MAOX phases (M = Mn, Cr; A = Ga, Al, X = C) obtained by the replacement of the A-layer in the parent MAX phase by the AO2 layer. The screening analysis of the magnetic and electronic properties of Mn- and Cr-based MAOX phases is performed using DFT calculations. All MAOX are thermodynamically stable. It was found that in MAOX phases Cr magnetic moments are pronounced increased in compare to corresponding MAX phase. Moreover, drastically changes in the electronic structure arise in Cr2AlO2C and Cr2GaO2C MAOX phases. The metal behavior in Cr2GaC MAX phase changes for the near to half-metallic behavior with 90% spin polarization at the Fermi energy in Cr2GaO2C MAOX phases. We have found that in Cr2AlO2C, the change in the electronic structure leads to the formation of the spin-gapless semiconductor state under slight extension in the ab plane. The obtained results make Cr2GaO2C and especially Cr2AlO2C prospective candidates for application as functional elements of electronics and spintronics. </div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811089","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