Effect of a systematic variation of Nd4Ba2Cu2O10 content on the magnetic properties of melt processed NdBa2Cu3O7-δ superconductor

被引：7

作者：

Babu, NH

Rajasekharan, T

Menon, L

Srinivas, S

Malik, SK

机构：

[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India

[2] Tata Inst Fundamental Res, Mumbai 400005, India

来源：

PHYSICA C | 1998年 / 305卷 / 1-2期

关键词：

texturing; magnetization; critical current density; pinning force;

D O I：

10.1016/S0921-4534(98)00331-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of a systematic variation of Nd-422 phase content on magnetic properties of melt textured Nd-123 has been investigated. Precisely estimated microstructural parameters such as volume fraction, morphology of Nd-422 particles, and the interface area between the Nd-422 particles and Nd-123 matrix, are correlated to the measured critical current densities. It is found that in the low field region and at higher temperatures, the interfacial pinning by Nd-422 particles is dominant. An anticlockwise tilt observed in the magnetization hysteresis loops at 77 K has been explained by a critical state model in combination with the standard theory of paramagnetism for Nd3+ ions with a Brillouin function. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：103 / 113

页数：11

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