Microstructure and superconducting properties of Dy-Ba-Cu-O bulk superconductors fabricated in different oxygen atmospheres

被引：17
作者：
Tanaka, H
Nariki, S
Sakai, N
Hirabayashi, I
Murakami, M
Takizawa, T
机构：
[1] Int Superconduct Technol Ctr, Superconduct Res Lab, Koto Ku, Tokyo 1350062, Japan
[2] Nihon Univ, Coll Humanities & Sci, Dept Phys, Setagaya Ku, Tokyo 1568550, Japan
[3] Shibaura Inst Technol, Minato Ku, Tokyo 1088548, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2005年 / 426卷
关键词：
Dy-Ba-Cu-O; bulk superconductor; melt processing; microstructure;
D O I：
10.1016/j.physc.2005.02.068
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have investigated the effect of microstructure and superconducting properties of melt-textured Dy-Ba-Cu-O bulk superconductors on various oxygen partial pressures in melt processing. The c-axis-oriented Dy-Ba-Cu-O bulk superconductors are melt textured in 1% O-2-Ar, air and pure O-2. It is found that the distribution of voids in the microstructure depends on oxygen pressures. The number of voids decreases in a sample fabricated in O-2. The peak effect is observed in J(c)-B curves of these samples except for the sample fabricated in 1% O-2. Such behavior is similar to those found in Nd- and Sm-Ba-Cu-O. These results indicate the possibility of the Dy/Ba substitution. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：660 / 665
页数：6
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