Journal of Superconductivity and Novel Magnetism最新文献

Synthesis-Dependent Phase Formation, Magnetic Exchange Coupling and Magneto-Optical Properties of Carbon-Coated Cobalt-Based Nanoparticles 碳包覆钴基纳米颗粒的合成依赖相形成、磁交换耦合和磁光性质

IF 1.8 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-10-19 DOI: 10.1007/s10948-026-07253-1

O. S. Ivanova, I. S. Edelman, A. E. Sokolov, A. L. Sukhachev, M. N. Volochaev, R. D. Ivantsov, M. S. Molokeev, E. N. Nikolaeva, A. M. Popova, Chun-Rong Lin, Bing-Yu Chen

{"title":"Synthesis-Dependent Phase Formation, Magnetic Exchange Coupling and Magneto-Optical Properties of Carbon-Coated Cobalt-Based Nanoparticles","authors":"O. S. Ivanova, I. S. Edelman, A. E. Sokolov, A. L. Sukhachev, M. N. Volochaev, R. D. Ivantsov, M. S. Molokeev, E. N. Nikolaeva, A. M. Popova, Chun-Rong Lin, Bing-Yu Chen","doi":"10.1007/s10948-026-07253-1","DOIUrl":"10.1007/s10948-026-07253-1","url":null,"abstract":"<div><p>Nanoparticles containing metallic cobalt, cobalt oxides CoO, Co<sub>3</sub>O<sub>4</sub>, cobalt carbide Co<sub>2</sub>C, and combinations of these materials were synthesized via thermal decomposition of a solution of oleic acid, oleylamine, and cobalt acetate under various conditions. A carbon shell formed on the surface of the nanoparticles directly during the decomposition process. X-ray diffraction with Rietveld refinement and transmitted electron microscopy were used to determine the structure, phase composition, morphology, and size of the nanoparticles. Raman spectroscopy confirmed the formation of a carbon shell around the nanoparticles under all decomposition conditions. Field and temperature dependences of magnetization allowed us to establish the core-shell structure of the nanoparticles. For all types of synthesized nanoparticles, a shift in the hysteresis loops due to exchange interaction was observed, and the magnitude of the exchange anisotropy field was estimated. The spectrum of magnetic circular dichroism was shown to be described by curves similar in shape to that characteristic of metallic cobalt, but shifted along the axis of light wave energy depending on the phase composition.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 6","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149214617","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

Current – Voltage Characteristics in Magnetic Field for Layered Superconductor with Intrinsic Pinning of Josephson Vortices 具有约瑟夫森涡流内禀钉钉的层状超导体的磁场电流电压特性

IF 1.8 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-10-14 DOI: 10.1007/s10948-026-07254-0

T. B. Charikova, V. N. Neverov, M. R. Popov, S. D. Popov, N. G. Shelushinina, A. A. Ivanov

引用次数: 0

In-depthstudy of the Chromite Compound LaNdSrAgCrO3 Structure, Dielectricity, Magnetic and Technological Application RecentAdvances 铬铁矿复合材料LaNdSrAgCrO3结构、介电、磁性及技术应用研究进展

IF 1.8 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-10-05 DOI: 10.1007/s10948-026-07250-4

H. Issaoui, M. Brahmi, F. Issaoui, E. dhahri, Benilde F.O. Costa, Bernardo A. Nogueira, Rui Fausto

{"title":"In-depthstudy of the Chromite Compound LaNdSrAgCrO3 Structure, Dielectricity, Magnetic and Technological Application RecentAdvances","authors":"H. Issaoui, M. Brahmi, F. Issaoui, E. dhahri, Benilde F.O. Costa, Bernardo A. Nogueira, Rui Fausto","doi":"10.1007/s10948-026-07250-4","DOIUrl":"10.1007/s10948-026-07250-4","url":null,"abstract":"<div><p>This work investigates the structural, magnetic, electrical, and dielectric properties of the multi-element A-site substituted perovskite La₀.₅₇Nd₀.₁₀Sr₀.₁₈Ag₀.₁₅CrO₃ (LNSACrO) synthesized by the sol–gel method. X-ray diffraction and Rietveld refinement confirm a rhombohedral structure with the R-3c space group. Raman and SEM analyses reveal lattice distortion and a polycrystalline microstructure. Magnetic measurements performed under 0.05 T show a complex magnetic behavior, with an antiferromagnetic transition at TN = 12 K and a ferromagnetic–paramagnetic transition at TC = 275 K, highlighting the influence of multi-cation A-site substitution on the magnetic ordering. Electrical measurements reveal thermally activated conduction with an activation energy of 0.280 eV, while the temperature dependence of the Jonscher exponent indicates a correlated barrier hopping (CBH) mechanism. Impedance analysis confirms non-Debye relaxation and distinct grain and grain-boundary contributions. These results demonstrate the strong coupling between A-site chemical disorder and the magnetic and electrical properties of LNSACrO, highlighting its potential for multifunctional magneto-dielectric and electronic applications.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-026-07250-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132482","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

Magneto-Thermal Analysis of a Hexagonal Core-Shell Nanotube Via Mean-Field Theory and Monte Carlo Simulations 基于平均场理论和蒙特卡罗模拟的六方核壳纳米管的磁热分析

IF 1.8 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-10-03 DOI: 10.1007/s10948-026-07251-3

Anouar Elidrysy, Ali Ismael Al-brihy, Manal Choubi, Said Harir

{"title":"Magneto-Thermal Analysis of a Hexagonal Core-Shell Nanotube Via Mean-Field Theory and Monte Carlo Simulations","authors":"Anouar Elidrysy, Ali Ismael Al-brihy, Manal Choubi, Said Harir","doi":"10.1007/s10948-026-07251-3","DOIUrl":"10.1007/s10948-026-07251-3","url":null,"abstract":"<div><p>This study presents a comprehensive magneto-thermal analysis of a ferrimagnetic hexagonal nanotube with a core-shell structure. The system consists of a core with a spin-3/2 and a shell with a spin-2. Using both the Mean-Field Approximation (<i>MFA</i>) and Monte Carlo Simulations (<i>MCS</i>), we investigate the system’s magnetic properties, phase diagrams, and hysteresis behavior. Our findings reveal complex thermal phenomena, including first- and second-order phase transitions, as well as single and multiple compensation temperatures. The phase diagrams illustrate the influence of key parameters, such as the exchange coupling interactions, the external magnetic field, and the crystal field, on the critical and compensation temperatures. Furthermore, the hysteresis loops demonstrate rich magnetic behavior, showing multi-loop patterns that are sensitive to both temperature and external magnetic field. The use of both theoretical methods provides a robust understanding of this system, highlighting the crucial role of geometric confinement and mixed-spin configurations in creating tunable magnetic properties for potential spintronic applications.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132189","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

Frequency-Selective Demultiplexing of Spin Waves in a Cross-Shaped System of YIG Microwave Waveguides 十字形YIG微波波导系统中自旋波的频率选择性解复用

IF 1.8 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-09-29 DOI: 10.1007/s10948-026-07247-z

A. A. Manysheva, N. Yu. Yasnev, A. V. Sadovnikov

引用次数: 0

Constriction-Type Superconducting Quantum Device Modified by Local Thermal Effect 局域热效应修饰的缩窄型超导量子器件

IF 1.8 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-09-23 DOI: 10.1007/s10948-026-07243-3

Shuo Xiang, Tuo Zhang, Wenqian Liu, Songling Xiao, Yicong Huang, Hao Zhang, Yu Liu, Longbiao Chen, Quan Li, Penghui Wang, Weijian Zhang, Keyu Wu, Jianxin Lin

{"title":"Constriction-Type Superconducting Quantum Device Modified by Local Thermal Effect","authors":"Shuo Xiang, Tuo Zhang, Wenqian Liu, Songling Xiao, Yicong Huang, Hao Zhang, Yu Liu, Longbiao Chen, Quan Li, Penghui Wang, Weijian Zhang, Keyu Wu, Jianxin Lin","doi":"10.1007/s10948-026-07243-3","DOIUrl":"10.1007/s10948-026-07243-3","url":null,"abstract":"<div><p>We report a method to locally modify superconducting materials using nano-laser direct writing, rather than conventional ablation or etching, for the fabrication of constriction-type Josephson junctions and superconducting quantum devices. Specifically, at a fixed laser power of 120 mW, the critical current <span>(I_c)</span> can be modified from 250 <span>(mu )</span>A to 80 <span>(mu )</span>A by increasing the pulse width from 3.0 ms to 4.0 ms, establishing an optimal processing window prior to the onset of irreversible film degradation. The optimized SQUID operated at 4.0 K exhibited a voltage-flux modulation depth of approximately 200 <span>(mu )</span>V, a maximum flux-to-voltage transfer coefficient <span>(V_{varPhi })</span> of 0.75 mV/<span>(varPhi _0)</span>, and a white flux noise spectral density of 2 <span>(mu varPhi _0)</span> Hz<span>(^{-1/2})</span>. With its ability to locally modify superconducting properties without material removal, this approach opens new avenues for in-situ tunable Josephson junctions and provides a flexible platform for future superconducting quantum circuits.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034865","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

Tuning the Magnetic Response of BiFeO3 Nanoparticles by Controlling the Chemical Prehistory 通过控制化学史前调节BiFeO3纳米颗粒的磁响应

IF 1.8 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-09-23 DOI: 10.1007/s10948-026-07249-x

Natalia Lomanova

引用次数: 0

Effect of CdCl2 Doping on the Structural Evolution, Mechanical Properties, and Superconducting Transition Behavior of MgB2 CdCl2掺杂对MgB2结构演变、力学性能和超导转变行为的影响

IF 1.8 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-09-19 DOI: 10.1007/s10948-026-07248-y

Naki Kaya, Songül Ulufer Bulut

{"title":"Effect of CdCl2 Doping on the Structural Evolution, Mechanical Properties, and Superconducting Transition Behavior of MgB2","authors":"Naki Kaya, Songül Ulufer Bulut","doi":"10.1007/s10948-026-07248-y","DOIUrl":"10.1007/s10948-026-07248-y","url":null,"abstract":"<div><p>In this study, the effects of CdCl<sub>2</sub> doping on the structural, mechanical, and superconducting transition behavior of MgB<sub>2</sub> superconductors were investigated. MgB<sub>2</sub> samples containing 0, 3, 5, and 10 wt% CdCl<sub>2</sub> were synthesized by the conventional solid-state reaction method. Structural characterization was performed using X-ray diffraction (XRD) and scanning electron microscopy (SEM), while the superconducting transition behavior was evaluated by temperature-dependent electrical resistivity (R–T) measurements. Mechanical properties were investigated by the Vickers microhardness method and analyzed using Meyer’s law, the proportional specimen resistance (PSR), elastic/plastic deformation (EPD), and Hays–Kendall (HK) models. Quantitative grain-size analysis using Fiji/ImageJ revealed a systematic increase in the mean Feret diameter from 0.273 ± 0.037 μm for the undoped sample to 2.792 ± 0.623 μm for the 10 wt% CdCl<sub>2</sub>-doped sample, accompanied by a progressive shift of the grain-size distribution toward larger sizes. These results provide quantitative evidence for grain coarsening induced by CdCl<sub>2</sub> addition. The superconducting transition temperature decreased with increasing dopant content, together with changes in the transition width. Microhardness measurements exhibited a pronounced reverse indentation size effect (RISE), and the hardness enhancement was associated with grain coarsening and microstructural densification suggested by the quantitative ImageJ analysis and SEM observations. Among the evaluated models, Meyer’s law showed the best agreement with the experimental data. Overall, CdCl<sub>2</sub> addition enhanced the mechanical response of MgB<sub>2</sub> while modifying its superconducting transition behavior.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986764","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

Constant Phase Element for Magnetic Hysteresis: A Fractional-Order Lumped-Parameter Model 磁滞的恒相元：分数阶集总参数模型

IF 1.8 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-09-19 DOI: 10.1007/s10948-026-07246-0

Mohamed Khebbab

{"title":"Constant Phase Element for Magnetic Hysteresis: A Fractional-Order Lumped-Parameter Model","authors":"Mohamed Khebbab","doi":"10.1007/s10948-026-07246-0","DOIUrl":"10.1007/s10948-026-07246-0","url":null,"abstract":"<div><p>This paper proposes a highly compact, two-branch-type lumped-parameter equivalent circuit for broadband core loss estimation in high-frequency magnetic components. The parallel architecture is streamlined to its physical essentials: a generalized Play operator synthesized via resistance and Zener-diode branches to model the complete quasi-static magnetization curve up to the saturation flux density (<span>(varvec{B_{sat}})</span>), and a fractional-order Constant Phase Element (CPE) to natively encode rate-dependent anomalous losses. This decoupled architecture enables fully deterministic parameter extraction: unconstrained Non-Negative Least Squares (NNLS) optimally maps the static hysteresis, while multi-frequency log-log energy regression isolates the dynamic fractional order <span>(alpha )</span>. Validated experimentally from 25 Hz to 5 kHz, the model yields a <span>(varvec{1.22%})</span> energetic error at 5 kHz and accurately captures complex minor loops and demagnetization trajectories. Its structural sparsity and thermodynamic consistency make it a highly efficient tool for rapid system-level power electronics simulations.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986886","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

Phase Dynamics and Dissipation in Tunnel Ferromagnetic Josephson Junctions 隧道铁磁Josephson结的相动力学和耗散

IF 1.8 4区物理与天体物理

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-09-15 DOI: 10.1007/s10948-026-07236-2

F. Calloni, R. Satariano, R. Ferraiuolo, H. G. Ahmad, D. Gatta, E. Raja, G. Santo, G. Serpico, R. Vydyasagar, D. Montemurro, N. Poccia, A. Vettoliere, G. Ausanio, C. Granata, L. Parlato, G. P. Pepe, A. Bruno, F. Tafuri, D. Massarotti

{"title":"Phase Dynamics and Dissipation in Tunnel Ferromagnetic Josephson Junctions","authors":"F. Calloni, R. Satariano, R. Ferraiuolo, H. G. Ahmad, D. Gatta, E. Raja, G. Santo, G. Serpico, R. Vydyasagar, D. Montemurro, N. Poccia, A. Vettoliere, G. Ausanio, C. Granata, L. Parlato, G. P. Pepe, A. Bruno, F. Tafuri, D. Massarotti","doi":"10.1007/s10948-026-07236-2","DOIUrl":"10.1007/s10948-026-07236-2","url":null,"abstract":"<div><p>We investigate tunnel ferromagnetic Josephson junctions based on Superconductor-Insulator-thin superconductor-Ferromagnet-Superconductor multilayers. A comparative study of their electrodynamic properties is performed for junctions with niobium and aluminum (Al) electrodes, featuring different ferromagnetic interlayer materials and lateral dimensions ranging from the micrometric to the submicrometric scale. The parameters extracted from the fitting of the current-voltage characteristics using the tunnel junction microscopic model are found to be consistent with those independently estimated from switching current distribution measurements. Submicrometric Al-based devices exhibit electrodynamic properties comparable to those implemented in state-of-the-art transmon qubits and display clear signatures of quantum phase diffusion. The strong agreement between transport modelling and escape dynamics establishes a robust framework for describing hybrid ferromagnetic Josephson junctions consistent with their energy scales and supports their potential integration into superconducting quantum and classical digital circuits.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"39 5","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-026-07236-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986436","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