The low-temperature, high-magnetic-field critical current characteristics of Zr-added (Gd, Y)Ba2Cu3Ox superconducting tapes

被引：73
|
作者：
Selvamanickam, V. [1 ,2 ]
Yao, Y. [1 ,2 ]
Chen, Y. [3 ]
Shi, T. [1 ,2 ]
Liu, Y. [1 ,2 ]
Khatri, N. D. [1 ,2 ]
Liu, J. [1 ,2 ]
Lei, C. [3 ]
Galstyan, E. [1 ,2 ]
Majkic, G. [1 ,2 ]
机构：
[1] Univ Houston, Dept Mech Engn, Houston, TX 77204 USA
[2] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA
[3] SuperPower Inc, Schenectady, NY 12304 USA
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2012年 / 25卷 / 12期
关键词：
COATED CONDUCTORS;
D O I：
10.1088/0953-2048/25/12/125013
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Critical current performances of state-of-the-art Zr-added (Gd, Y)BaCuO tapes have been investigated over a temperature range of 20-77 K, in magnetic fields up to 9 T and over a wide angular range of magnetic field orientations. The peak in critical current that is commonly observed in the field orientation perpendicular to the tape in BaZrO3 (BZO) containing superconducting tapes is found to vanish at 30 K in magnetic fields at 1-9 T. While the critical current of 15% Zr-added tapes was about 40% lower than that of 7.5% Zr-added tapes at 77 K, the pinning force values of the former were found to be 18-23% higher than those of the latter in the temperature range of 20-40 K and in magnetic fields of 3-5 T. The results from this study emphasize the importance of optimization of coated conductor fabrication processes for optimum performance not just in low magnetic fields at 77 K but also at the operating conditions of low temperatures and high magnetic fields that are of interest, especially for rotating superconducting machinery applications.
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