Superconducting layer thickness of relaxation properties of persistent current in high magnetic field in YBCO-coated conductor

被引：1
|
作者：
Matsutani, F. [1 ]
Himeki, K. [1 ]
Muchi, M. [1 ]
Otabe, E. S. [1 ]
Matsushita, T. [1 ]
Miyata, S. [2 ]
Ibi, A. [2 ]
Yamada, Y. [2 ]
Shiohara, Y. [2 ]
机构：
[1] Kyushu Inst Technol, Dept Comp Sci & Elect, Fukuoka 8208502, Japan
[2] Superconduct Res Lab, Minato Ku, Tokyo 1050004, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2009年 / 469卷 / 15-20期
关键词：
YBCO; Thickness; Relaxation; U-0(center dot); Flux creep-flow model; DEPENDENCE;
D O I：
10.1016/j.physc.2009.05.238
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
It was previously shown that the apparent pinning potential U-0(center dot) associated with the relaxation of superconducting current at low magnetic fields depended on the thickness of superconducting layer for IBAD/PLD-processed YBCO-coated conductors. It is necessary to clarify the thickness dependence of the relaxation property at high magnetic fields for application of YBCO-coated conductors in a persistent current mode at Such magnetic fields. In this study, the thickness dependence was investigated in the field range of 1-6 T at 20 K for IBAD/PLD-processed YBCO-coated conductors with the superconducting layer thicknesses of 0.25-1.0 mu m. it was found that U-0(center dot) decreases monotonically with decreasing thickness at 6 T. This seems to be attributed to the two-dimensional pinning mechanism because of the longitudinal flux bundle size limited by the film thickness. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：1122 / 1125
页数：4
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