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
收藏
页码：103 / 113
页数：11
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