Effect of microstructure on the superconducting properties of Gd-Ba-Cu-O bulk fabricated in air

被引：11
|
作者：
Nariki, S
Hinai, H
Sakai, N
Murakami, M
Otsuka, M
机构：
[1] ISTEC, Superconduct Res Lab, Minato Ku, Tokyo 1050023, Japan
[2] Shibaura Inst Technol, Minato Ku, Tokyo 1088548, Japan
来源：
PHYSICA C | 2001年 / 357卷 / 357-360期
关键词：
melt processing; critical temperature; critical current density; Gd-Ba-Cu-O;
D O I：
10.1016/S0921-4534(01)00373-2
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Bulk Gd-Ba-Cu-O superconductors were melt processed in air. The Gd2BaCuO5 (Gd211) particles dispersed in the melt-textured bulk could be refined by employing fine Gd211 starting powders. Since T-c of the bulk samples was lowered with decreasing the size of Gd211 particle, J(c) was not improved. However, we found that a depression of T-c was prevented by Ag addition, leading to higher J(c) values. The J(c) of Gd-Ba-Cu-O/Ag with Gd211 particles about 0.7 mum in size exhibited 60 000 A/cm(2) at 77 K and self-field. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：817 / 820
页数：4
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