Temperature dependence of the peak effect in NdBa2Cu3O7-δ single crystals and melt-processed (Sm0.5Eu0.5)Ba2Cu3O7-δ single domains

被引：5
|
作者：
Hu, A [1 ]
Chikumoto, N [1 ]
Inoue, K [1 ]
Murakami, M [1 ]
机构：
[1] Int Supercond Technol Ctr, Supercond Res Lab, Minato Ku, Tokyo 1050023, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2003年 / 392卷
关键词：
peak effect; compositional fluctuation; surface barrier; interfacial pinning;
D O I：
10.1016/S0921-4534(03)01051-7
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Magnetization loops of NdBa2Cu3O7-delta (Nd123) single crystals grown under low oxygen partial pressure and melt-processed (Sm0.5Eu0.5)Ba2Cu3O7-delta (SE123) crystals with post-annealing in At were comparatively studied in a wide temperature and field regime. The peak field at which magnetic moment displays the maximum, exhibits a linear temperature dependence in both cases. The fitting shows a slightly lower critical temperature than bulk T, at null applied field. The temperature dependence of the onset field from which the absolute value of magnetic moment starts to increase, indicates the dominant pinning at low fields in Nd123 single crystals is the surface barrier while the RE211/123 interfacial pinning in melt-processed SE123 crystals. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：345 / 348
页数：4
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