单晶粒YBa2Cu3O7-y体超导体悬浮力和俘获磁场的取向和厚度依赖性

IF 0.2 Q4 PHYSICS, APPLIED

Progress in Superconductivity and Cryogenics Pub Date : 2017-03-31 DOI:10.9714/PSAC.2017.19.1.030

Y. Jung, S. Go, H. Joo, Y. J. Lee, S.-D. Park, B. Jun, C. Kim

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引用次数: 2

摘要

2017)摘要研究了晶体取向和样品厚度对单粒YBCO块体超导体磁浮力(F)和俘获磁场(B)的影响。采用表面为(001)、(110)或(100)的单粒YBCO样品作为测试样品。用于力距(F-d)测量的样品在77 K下无磁场冷却(零场冷却，ZFC)，而用于B测量的样品在Nd-B-Fe永磁体的外磁场下冷却(场冷却，FC)。发现(001)表面的F和B均高于(110)和(100)表面，这是由于(001)表面具有较高的临界电流密度(J c)。对于t =5 ~ 18 mm的(001)样品，ZFC样品的最大磁悬浮力(fmax s)大于40 n，约80%的外加磁场被困在FC样品中。当t小于5 mm时，F和B迅速减小。为了保持较大的悬浮/捕获性能，存在一个临界样品厚度(在本研究的实验条件下为t =5 mm)，这取决于材料特性和外磁的大小

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Orientation and thickness dependence of magnetic levitation force and trapped magnetic field of single grain YBa2Cu3O7-y bulk superconductors

2017) Abstract The effects of the crystallographic orientation and sample thickness on the magnetic levitation forces ( F ) and trapped magnetic field ( B ) of single grain YBCO bulk superconductors were examined. Single grain YBCO samples with a (001), (110) or (100) surface were used as the test samples. The samples used for the force-distance ( F-d ) measurement were cooled at 77 K without a magnetic field (zero field cooling, ZFC), whereas the samples used for the B measurement were cooled under the external magnetic field of a Nd-B-Fe permanent magnet (field cooling, FC). It was found that F and B of the (001) surface were higher than those of the (110) or (100) surface, which is attributed to the higher critical current density ( J c ) of the (001) surface. For the (001) samples with t =5 – 18 mm, the maximum magnetic levitation forces ( F max s) of the ZFC samples were larger than 40 N. About 80% of the applied magnetic field was trapped in the FC samples. However, the F and B decreased rapidly as t decreased below 5 mm. There exists a critical sample thickness ( t =5 mm for the experimental condition of this study) for maintaining the large levitation/trapping properties, which is dependent on the material properties and magnitude of the external magnetic

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来源期刊

Progress in Superconductivity and Cryogenics PHYSICS, APPLIED-

CiteScore

0.40

自引率

33.30%

发文量

期刊介绍： Progress in Superconductivity and Cryogenics is the official publication of The Korea Institute of Applied Superconductivity and Cryogenics and the Korean Superconductivity Society. It was launched in 1999, and accepts original research articles and review papers on research on superconductivity and related fields of physics, electronic devices, materials science, large-scale applications for magnets, power and energy, and cryogenics. The Journal is published quarterly in March, June, September, and December each year. Supplemental issues are published occasionally. The official title of the journal is ''Progress in Superconductivity and Cryogenics'' and the abbreviated title is ''Prog. Supercond. Cryog.'' All submitted manuscripts are peer-reviewed by two reviewers. The text must be written in English. All the articles in this journal are KCI and SCOPUS as of 2015. The URL address of the journal is http://psac.kisac.org where full text is available. This work was supported by the Korean Federation of Science and Technology Societies grant funded by the Korea government.