Improvement in field trapping capability of (Nd,Eu,Gd) Ba2Cu3Oy with Ag2O addition

被引：11

作者：

Muralidhar, M ^{[1
]}

Jirsa, M ^{[1
]}

Sakai, N ^{[1
]}

Murakami, M ^{[1
]}

机构：

[1] SRL, ISTEC, Superconduct Res Lab, Div 3,Minato Ku, Tokyo 105, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2001年 / 40卷 / 11期

关键词：

melt-textured materials; single domain; microstructure; flux pinning; critical current density (J(c)); trapped filed;

D O I：

10.1143/JJAP.40.6329

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We prepared (Nd,Eu,Gd) Ba2Cu3O7-delta (NEG-123) pellets of 22 mm diameter and 9 mm thickness with 10 mole% NEG-211, 0.5 mole% Pt, and various amounts of Ag2O ranging from 0 to 50 wt% using the oxygen-controlled melt-growth (OCMG) process. The irreversibility field increased with Ag2O content up to 20 wt%, and even with 50 wt% the magnetization loop was open at 77 K and 7 T. In the sample with 20 wt% Ag2O, a large critical current density of 10 kA cm(-2) was recorded even at 7 T and 77 K for fields applied parallel to the c-axis. The trapped field in the NEG-123 bulk was measured using a Hall probe at 77 K after field-cooling in 5 T. A single-peak profile observed in the sample with silver addition proved that silver dispersion is effective in improving mechanical properties without deterioration of electromagnetic properties.

引用

页码：6329 / 6334

页数：6

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