Flux Pinning Enhancements of YBa2Cu3O7-x with Nanosize Magnetic Additions

被引:4
作者
Sebastian, M. A. [1 ]
Pierce, N. A. [2 ]
Maartense, I [1 ]
Kozlowski, G. [2 ]
Haugan, T. J. [3 ]
机构
[1] Univ Dayton, Res Inst, Dayton, OH 45469 USA
[2] Wright State Univ, Dayton, OH 45435 USA
[3] US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH 45433 USA
来源
ADVANCES IN CRYOGENIC ENGINEERING - MATERIALS (ICMC 2019) | 2020年 / 756卷
关键词
THIN-FILMS; SUPERCONDUCTIVITY;
D O I
10.1088/1757-899X/756/1/012026
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Different methods of flux pinning are being tested world-wide to enhance critical currents (Ls) of high temperature superconductor YBa2Cu3O7-x (YBCO) coated conductors exposed to high magnetic fields. Magnetic materials are interesting to consider as flux pinning additions because of their potential for very strong pinning strength. To our knowledge, there have been limited demonstrations of magnetic pinning additions to YBCO conductors. This paper describes the study of different M magnetic phase additions to YBCO including M = BaFe12O19, La0.67Ca0.33MnO3, and other oxide phases. Nanosize additions were incorporated by depositing multilayer (M/YBCO)N films to minimize degradation of T-c, and testing volume % additions of M phase from 0.5 % to 5%. Results indicate that T-c onsets are depressed with magnetic additions, however in some cases interestingly without degrading the transition width. With optimization of magnetic additions a 50% increase of critical current density has been obtained, for low magnetic fields of < 10,000 Oe at 65K to 77K. Microstructural and superconducting properties are summarized, including SEM analysis.
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页数:8
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