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

页码：660 / 665

页数：6

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