Physica C-superconductivity and Its Applications最新文献_第2页

Two-band superconductivity in Pt-intercalated ZrTe2, a Dirac semimetal 铂插层 ZrTe2（一种狄拉克半金属）中的双带超导性

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2024-10-23 DOI: 10.1016/j.physc.2024.1354606

L.E. Correa , L.R. de Faria , F. Abud , M.S. da Luz , M.S. Torikachvili , A.J.S. Machado

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Weakly coupled Type-II superconductivity in a breathing Kagome metal ZrRe2 呼吸卡戈米金属 ZrRe2 中的弱耦合 II 型超导性

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2024-10-15 DOI: 10.1016/j.physc.2024.1354604

Yingpeng Yu , Zhaolong Liu , Qi Li , Zhaoxu Chen , Yulong Wang , Munan Hao , Yaling Yang , Xuhui Wang , Chunsheng Gong , Long Chen , Zhenkai Xie , Kaiyao Zhou , Huifen Ren , Xu Chen , Shifeng Jin

{"title":"Weakly coupled Type-II superconductivity in a breathing Kagome metal ZrRe2","authors":"Yingpeng Yu , Zhaolong Liu , Qi Li , Zhaoxu Chen , Yulong Wang , Munan Hao , Yaling Yang , Xuhui Wang , Chunsheng Gong , Long Chen , Zhenkai Xie , Kaiyao Zhou , Huifen Ren , Xu Chen , Shifeng Jin","doi":"10.1016/j.physc.2024.1354604","DOIUrl":"10.1016/j.physc.2024.1354604","url":null,"abstract":"<div><div>We present a comprehensive investigation of the superconducting properties of ZrRe2, a Re-based hexagonal Laves compounds. ZrRe2 crystallizes in a C14-type structure (space group P63/mmc), where the Re atoms form a breathing Kagome lattice, with cell parameters a = b = 5.2682(5) Å and c = 8.63045 Å. Through transport measurements, the superconducting transition is observed with <math><msubsup><mi>T</mi><mi>c</mi><mrow><mi>o</mi><mi>n</mi><mi>s</mi><mi>e</mi><mi>t</mi></mrow></msubsup></math> = 6.44 K and <math><msubsup><mi>T</mi><mi>c</mi><mrow><mi>z</mi><mi>e</mi><mi>r</mi><mi>o</mi></mrow></msubsup></math> = 6.06 K. In magnetization measurements(ZFC-FC) superconducting transition occurs at 6.12 K. The measured lower and upper critical fields are 6.27 mT and 7.84 T, respectively. Measurements of the specific heat capacity confirm the presence of bulk superconductivity, with a normalized specific heat change of <math><mrow><mstyle><mi>Δ</mi></mstyle><msub><mi>C</mi><mi>e</mi></msub><mo>/</mo><mi>γ</mi><msub><mi>T</mi><mi>c</mi></msub><mo>=</mo><mn>1.63</mn></mrow></math> and an electron-phonon strength of <math><mrow><msub><mi>λ</mi><mrow><mi>e</mi><mi>p</mi></mrow></msub><mo>=</mo><mn>0.69</mn></mrow></math>. DFT calculations revealed that the band structure of ZrRe2 is intricate and without van Hove singularity.</div></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"626 ","pages":"Article 1354604"},"PeriodicalIF":1.3,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

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A planar mounted SQUID full-tensor module for magnetoenterogram denoising detection 用于磁心图去噪检测的平面安装式 SQUID 全张量模块

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2024-09-07 DOI: 10.1016/j.physc.2024.1354575

Hua Li, Mingyue Zhang

引用次数: 0

Comparative study on the impact of different E-J relations on the performance of resistive superconducting fault current limiters under high and low impedance faults in cryo-electric aircraft 低温电动飞机高阻抗和低阻抗故障下不同 E-J 关系对电阻式超导故障限流器性能影响的比较研究

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2024-09-07 DOI: 10.1016/j.physc.2024.1354576

Dedao Yan, Mohammad Yazdani-Asrami, Wenjuan Song

{"title":"Comparative study on the impact of different E-J relations on the performance of resistive superconducting fault current limiters under high and low impedance faults in cryo-electric aircraft","authors":"Dedao Yan, Mohammad Yazdani-Asrami, Wenjuan Song","doi":"10.1016/j.physc.2024.1354576","DOIUrl":"10.1016/j.physc.2024.1354576","url":null,"abstract":"<div>To achieve the goal of zero emission in aviation, it is critical to advance electric aircraft technologies, especially in short to medium range flights. Superconducting fault current limiters (SFCLs) have shown promising potential in electric aircraft system as a protection solution to limit the peak of fault current. Many research works focused on the SFCL performance under low impedance faults, where the fault current is much higher than the nominal current and the SFCL will transit to normal (metal) state quickly. However, there are limited reports on investigating the SFCL reacting to high impedance faults for electric aircraft system, where the SFCL does not abruptly transit to normal state. In this paper, we built an electric-thermal coupled model in MATLAB which simulates the behaviour of a resistive type SFCL both under low and high impedance faults. We investigated three mathematical relations of local electric field E and local current density J representing the transition from superconducting state to normal state, both under high and low impedance fault. The three mathematical relations are classic E-J power-law, modified E-J power-law and two- stage E-J power law. The electric-thermal model of the SFCL incorporating all these three types of mathematical relations, respectively, have been used to calculate the SFCL responses under high and low impedance faults, and compared with each other, as well as testing results. The limited fault current, voltage drop, resistance and temperature variations in the SFCL are observed and analysed. The results have shown that the proposed SFCL model is able to accurately characterise a resistive type SFCL under both high impedance and low impedance fault.</div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"625 ","pages":"Article 1354576"},"PeriodicalIF":1.3,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0921453424001400/pdfft?md5=a7e010a042e6c72bf8aa31e5402d1531&pid=1-s2.0-S0921453424001400-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142149961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

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Manufacture process and cabling optimization of Bi2212 CICC Bi2212 CICC 的制造工艺和布线优化

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2024-09-07 DOI: 10.1016/j.physc.2024.1354579

Hang Zhao , Jinggang Qin , Lei Yu , Jianyuan Xu , Binglun Xiang , Hangwei Ding , Qingbin Hao , Pengcheng Huang , Wenge Chen

引用次数: 0

Calculation of AC loss using 2D homogenization method for HTS synchronous condenser rotor and validation 使用二维均质化方法计算 HTS 同步冷凝器转子的交流损耗并进行验证

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2024-09-07 DOI: 10.1016/j.physc.2024.1354578

Pengwei Li , Cong Wang , Zhirui Ma , Lei Wang

{"title":"Calculation of AC loss using 2D homogenization method for HTS synchronous condenser rotor and validation","authors":"Pengwei Li , Cong Wang , Zhirui Ma , Lei Wang","doi":"10.1016/j.physc.2024.1354578","DOIUrl":"10.1016/j.physc.2024.1354578","url":null,"abstract":"<div>Compared with low-temperature superconductors, second-generation high-temperature superconducting materials offer higher current densities and temperature margins, which provide a boost to the development of superconducting condenser towards large capacity and light weight. In this paper, a 3D-to-2D dimensionality reduction and simplification method is proposed to address the problem of massive computation of 3D finite element model during the optimization of superconducting condenser rotor performance parameters. This method splits the pole based on the geometric characteristics of the rotor pole, establishes a 2D simplified model of each part of the pole after splitting, and uses the simplified model to calculate the key physical quantities such as the magnetic field, AC loss, temperature change, etc., during the excitation process of the superconducting condenser rotor. This method effectively reduces the computational complexity of the model and improves the efficiency of the calculation and iterative optimization of the magnet pole parameters. In order to verify the correctness of the electromagnetic calculation results of the simplified model, the rotor magnet model was assembled to carry out experiments in liquid nitrogen bath, and the experimental results were in good agreement with the calculation results.</div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"625 ","pages":"Article 1354578"},"PeriodicalIF":1.3,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142149962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

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Design and test of a compact twisted stacked YBCO cable for fusion application 设计和测试用于聚变应用的紧凑型双绞叠层 YBCO 电缆

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2024-09-07 DOI: 10.1016/j.physc.2024.1354582

Yifeng Li, Shaotao Dai, Junfeng Yang, Tao Ma

{"title":"Design and test of a compact twisted stacked YBCO cable for fusion application","authors":"Yifeng Li, Shaotao Dai, Junfeng Yang, Tao Ma","doi":"10.1016/j.physc.2024.1354582","DOIUrl":"10.1016/j.physc.2024.1354582","url":null,"abstract":"<div>To meet the application requirements of high magnetic field and high current in future fusion magnet systems, a compact twisted stacked tape cable with high current density is proposed. Three stepped grooves are evenly distributed around a circular former, and a 20+10 superconducting tapes configuration is arranged in each single groove. The performance of the cable under self-field is investigated through simulation modeling and experiment on a 1-meter sample. Firstly, the electromagnetic and mechanical properties of cables are studied through simulation. According to the simulation results, the prospective critical current reaches 5090 A under self-field at 77 K while the maximum von Mises stress and volumetric strain obtained from the simulation during the current-carrying process are within acceptable ranges. A sample with a twist pitch of 300 mm is fabricated, consisting of 18 superconducting tapes and 72 copper tapes. The measured and simulated results of the critical current of this sample are 1900 A and 1970 A respectively, with a deviation of 3.5 percent. The feasibility of the proposed cable has been preliminarily demonstrated through these experimental and simulation results. Subsequent research will be conducted on the optimization of cable parameters, including geometric dimensions and tape capacity, to achieve better performance.</div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"625 ","pages":"Article 1354582"},"PeriodicalIF":1.3,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142149964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Orientation optimization of the Halbach PMG for the levitation and guidance performance of the HTS maglev system 优化哈尔巴赫永磁发电机的方向，提高 HTS 磁悬浮系统的悬浮和制导性能

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2024-08-22 DOI: 10.1016/j.physc.2024.1354567

Ye Hong, Zhichuan Huang, Jun Zheng, Jiwang Zhang, Zigang Deng

{"title":"Orientation optimization of the Halbach PMG for the levitation and guidance performance of the HTS maglev system","authors":"Ye Hong, Zhichuan Huang, Jun Zheng, Jiwang Zhang, Zigang Deng","doi":"10.1016/j.physc.2024.1354567","DOIUrl":"10.1016/j.physc.2024.1354567","url":null,"abstract":"<div>High-temperature superconducting maglev technology has great application potential in rail transit applications due to its advantages such as passive stable levitation and green environmental protection. As one of the key components of the HTS maglev system, the Halbach-type permanent magnet guideway (PMG) enhances the magnetic field on one side of the guideway and weakens that on the other side. Optimizing the PMG, including the geometry and magnetic properties of the magnet, is an effective method to improve the levitation and guidance performance of the system. In addition, since NdFeB permanent magnets are expensive, optimizing the design of the PMG for the HTS maglev system is also an important work to reduce the application cost. In this paper, the Nelder–Mead Simplex method (NMS) in the optimization solver in COMSOL software is used to optimize the geometric parameters of the Halbach PMG according to the different objective requirements of the HTS maglev system. The optimization objectives include the maximum levitation force and guidance force under the constraint of the maximum cross-sectional area of the PMG, as well as the minimum cross-sectional area of the PMG with a minimum levitation force constraint. The results indicate that the NMS method is effective. By comparing four PMGs during the optimization process, it is found that this method can fully improve the utilization of the magnetic field by changing the geometric parameters of the Halbach PMG. This study can provide a valuable reference for the optimal design of the PMG for HTS maglev systems in the future.</div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"624 ","pages":"Article 1354567"},"PeriodicalIF":1.3,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142041265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Suppression of the sausaging effect in (Ba,Na)Fe2As2 round wires by using Ag1−zSnz/Cu double sheath 使用 Ag1-zSnz/Cu 双层护套抑制 (Ba,Na)Fe2As2 圆导线中的滑动效应

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2024-08-22 DOI: 10.1016/j.physc.2024.1354555

Ryosuke Sakagami , Takeru Sasaki , Takamasa Ito , Tsuyoshi Tamegai , Hideki Kajitani , Satoshi Awaji

{"title":"Suppression of the sausaging effect in (Ba,Na)Fe2As2 round wires by using Ag1−zSnz/Cu double sheath","authors":"Ryosuke Sakagami , Takeru Sasaki , Takamasa Ito , Tsuyoshi Tamegai , Hideki Kajitani , Satoshi Awaji","doi":"10.1016/j.physc.2024.1354555","DOIUrl":"10.1016/j.physc.2024.1354555","url":null,"abstract":"<div>We report the fabrication of (Ba,Na)Fe2As2 round wires that are processed using the hot isostatic pressing (HIP) technique. We employed double sheaths composed of Cu and Ag1−zSnz alloy because they offer superior mechanical strength compared to pure Ag. The cross-sectional area of the wire core was measured using X-ray computed tomography. The findings of this study demonstrate that utilizing Ag1−zSnz alloy as the inner sheath material helps reduce the degree of the sausaging effect in the wire, resulting in a more uniform cross-sectional area of the wire core. However, transport critical current density (Jc) of the wires with the Ag1−zSnz alloy decreased gradually as the Sn content, z, increased, which may be attributed to the nonoptimized sintering temperatures during the HIP process. These results suggest that when heat-treated at an appropriate temperature during the HIP process, the use of Ag1−zSnz alloy holds great potential for use in high-performance applications.</div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"624 ","pages":"Article 1354555"},"PeriodicalIF":1.3,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0921453424001199/pdfft?md5=f8de9ba00ef5662319483ffb15d6e86e&pid=1-s2.0-S0921453424001199-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142041263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Improved prediction of critical currents for multi-pancake coil across variable temperature regions 改进跨变温区域的多盘片线圈临界电流预测

IF 1.3 3区物理与天体物理

Physica C-superconductivity and Its Applications Pub Date : 2024-08-22 DOI: 10.1016/j.physc.2024.1354568

Hao Dong , Daxing Huang , Hao Yu , Hongwei Gu , Fazhu Ding

{"title":"Improved prediction of critical currents for multi-pancake coil across variable temperature regions","authors":"Hao Dong , Daxing Huang , Hao Yu , Hongwei Gu , Fazhu Ding","doi":"10.1016/j.physc.2024.1354568","DOIUrl":"10.1016/j.physc.2024.1354568","url":null,"abstract":"<div>With the increasing performance of the second-generation high-temperature superconducting (2G-HTS) tapes, the technology of all-REBa2Cu3O7-δ (REBCO, RE: rare earth) superconducting magnets has developed rapidly. However, the 2G-HTS magnet with hybrid cryocoolers constantly adjusts its operating temperature according to the actual demands, which involves the critical current when the magnet crosses variable temperature regions. In this paper, a modified ideal model based on the homogenization model is proposed, which can predict the critical current of 2G-HTS magnets more consistently. The in-field properties of REBCO tapes in variable temperature regions were tested by the physical property measurement system. Furthermore, the improved model was combined with the in-field properties of REBCO tapes to obtain the critical currents of a 2G-HTS multi-pancake (MP) coil at 20 K, 30 K, 65 K, and 77 K. The critical current of a multi-pancake coil at 77 K was experimentally verified. The modified ideal model uses the actual current density, which results are closer to the experimental results with an agreement of 97.3%. This new method proposed in this work is significant in quickly predicting critical currents for 2G-HTS magnets across variable temperature regions.</div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":"624 ","pages":"Article 1354568"},"PeriodicalIF":1.3,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142041266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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