期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 364, 期 -, 页码 251-253出版社
ELSEVIER
DOI: 10.1016/S0921-4534(01)00765-1
关键词
RuSr2GdCu2O8; granularity; intragrain penetration depth; phase-separation model
The multi-stage transition of RuSr2GdCu2O8 (Ru1212) ceramic samples was investigated. An intergrain phase-lock temperature of T-2 is identified around 10-30 K. Slightly above T-2, however, an isolated Ru1212 grain still behaves as a Josephson-junction array of superconductive nano-domains, which are phase-locked below an interdomain phase-lock temperature (intragrain transition-temperature) of T-1 approximate to 33-40 K. The intragrain penetration depth lambda (1) was subsequently deduced from the ac susceptibility x' of powders with different particle-size d (0.3 less than or equal to d less than or equal to 10 mum in this work) between T-1 and T-2. The sample-dependent lambda (1) approximate to 2.5-6 mum so obtained is extremely long, and bears a systematic correlation with the T-1 observed. A phase-separation model was proposed to interpret the data. (C) 2001 Published by Elsevier Science B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据