Magneto optical observations of flux dynamics in Nd-Ba-Cu-O bulk superconductors

被引：1
|
作者：
Zamboni, M [1 ]
Yoo, SI [1 ]
Higuchi, T [1 ]
Waki, K [1 ]
Koishikawa, S [1 ]
Murakami, M [1 ]
机构：
[1] Int Supercond Technol Ctr, Supercond Res Lab, Div 7, Minato Ku, Tokyo 105, Japan
来源：
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 1998年 / 53卷 / 1-2期
关键词：
flux dynamics; Nd-Ba-Cu-O superconductors; Magneto Optical technique; anisotropy; iron-garnet films;
D O I：
10.1016/S0921-5107(97)00324-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The magnetic flux dynamics of Nd-Ba-Cu-O (NdBCO) bulk superconductors produced by the Oxygen-Controlled-Melt-Growth (OCMG) method has been investigated using the Magneto-Optical (M-O) technique at various low temperatures for an external magnetic field applied both parallel (H//c) and perpendicular (H perpendicular to c) to the c-axis of the sample, While for H//c the flux motion was isotropic, for H perpendicular to c anisotropic penetration and expulsion of the flux lines was observed directly. In the configuration H perpendicular to c the flux lines were observed to move in and out the sample predominantly parallel to the a-b planes. The flux behaviour has also been correlated to the microstructure. Particularly, microcracks along the basal plane were found to provide a low resistance channel for flux motion. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：185 / 188
页数：4
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