Enhanced flux pinning in (Nd0.33Sm0.67)Ba2Cu3O7-δ melt-processed superconductors by Ar postannealing

被引：43
|
作者：
Hu, A [1 ]
Schätzle, P [1 ]
Bieger, W [1 ]
Verges, P [1 ]
Fuchs, G [1 ]
Krabbes, G [1 ]
机构：
[1] Inst Festkorper & Werkstofforsch Dresden, D-01171 Dresden, Germany
来源：
APPLIED PHYSICS LETTERS | 1999年 / 75卷 / 02期
关键词：
D O I：
10.1063/1.124341
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
High-quality binary (Nd0.33Sm0.67)Ba2Cu3O7-delta monodomain superconductors were fabricated by the combination of a compositional-controlled melt-processing technique in air and postannealing in Ar. Critical current densities over the whole field range were observed strongly dependent on Ar postannealing while holding superconducting transition temperatures as high as 96 K. The suppressed chemical variation between the rare-earth element (RE: Nd, Sm) and Ba associated with disperse RE2BaCuOy (RE211) precipitate due to the decomposition occurring in Ar postannealing was attributed to the modified flux pinning. This makes Ar postannealing promising to process superconductors with desired properties for various applications. (C) 1999 American Institute of Physics. [S0003-6951(99)03528-7].
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收藏
页码：259 / 261
页数：3
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