Homogeneous distribution of 211 secondary-phase particles in single-grain melt-grown (Nd,Eu,Gd)Ba2Cu3O7 bulk

被引：4

作者：

Diko, P

Muralidhar, M

Koblischka, MR

Murakami, M

机构：

[1] Int Superconduct Technol Ctr, Superconduct Res Lab, Minato Ku, Tokyo 1050023, Japan

[2] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia

来源：

PHYSICA C | 2000年 / 339卷 / 03期

基金：

日本科学技术振兴机构;

关键词：

(Nd; Eu; Gd)Ba2Cu3Oy; melt processing; microstructure; bulk superconductors;

D O I：

10.1016/S0921-4534(00)00357-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The microstructural features of the (Nd,Eu,Gd)Ba2Cu3O7 (NEG) bulks were studied by optical microscopy in polarized light. The quantitative microstructural data were obtained using the image processing system, Image-Pro Plus. Unlike YBa2Cu3Oy melt-processed bulks, the NEG bulk superconductors prepared by oxygen-controlled-melt-growth process do not exhibit macroscopic 211 secondary-phase inhomogeneity due to 211 particle pushing. The lowering of interface energy and increase of melt viscosity are suggested to be responsible for the essential suppression of 211 pushing in NEG melt-grown bulks. This result opens a way to achieve a homogeneous distribution of the current densities in melt-grown bulk superconductors. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：143 / 147

页数：5

共 7 条

[1] Subgrain formation, 211 particle segregation and high-angle 90 degrees boundaries in melt-grown YBaCuO [J].