Determination of the material parameters of a melt-textured YBCO superconductor by DC magnetization analysis

被引：5

作者：

Çelebi, S ^{[1
]}

Öztürk, A ^{[1
]}

Yanmaz, E ^{[1
]}

Kopya, AI ^{[1
]}

机构：

[1] Karadeniz Tech Univ, Fac Sci & Arts, Dept Phys, TR-61080 Trabzon, Turkey

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 298卷 / 1-2期

关键词：

high-Tc superconductor; YBCO; critical state model; critical current density; Meissner current;

D O I：

10.1016/S0925-8388(99)00644-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the isothermal magnetization cut-yes of a YBCO superconducting sample prepared by a flame-quench-melt-growth (FQMG) method. Hysteresis loops have been calculated and analyzed in the framework of a critical state model including the Meissner current. The bulk critical current and Meissner current as a function of applied field were extracted, and the volume fraction of the grains, f(g), has been estimated to be 0.64 from a comparison of the theoretical and experimental M-H hysteresis loops. The lower critical field, mu(0)H(c1), was found to be 14.4 mT. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：285 / 290

页数：6