Study of (Nd, Sm)422 solid solution and its effect on the melt process of Nd123 bulk superconductors

被引：4
|
作者：
Yoshioka, J
Iida, K
Murakami, M
机构：
[1] ISTEC, Superconduct Res Lab, Morioka Lab, Morioka, Iwate 0200852, Japan
[2] ISTEC, Superconduct Res Lab, Tamachi Lab, Minato Ku, Morioka, Iwate 0200852, Japan
来源：
PHYSICA C | 2001年 / 354卷 / 1-4期
关键词：
Nd123; Nd422; Nd-Sm solid solution; transition temperature; critical current density;
D O I：
10.1016/S0921-4534(01)00140-X
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have studied the range of Nd-Sm solid solution in the (Nd1-x, Sm-x)(4-2y)Ba2+2yCu2-yOz, system in the Nd123 matrix. X-ray diffraction studies for the sintered (Nd1-x, Sm-x)(4-2y)Ba2+2yCu2-yOz powders in air showed that the samples were a single phase 422 in the range of x = 0-0.3, showing that Sm substituted on Nd site in Nd422. It was also found that Sm is soluble up to x = 0.3 in (Nd1-x, Sm-x)(3.6)Ba2.4Cu1.8Oz. We then fabricated Nd123/Nd422 bulk superconductors by melt processing, in which Nd123 powder is mixed with 20 mol% (Nd-0.8 Sm-0.2)(3.6)Ba2.4Cu1.8Oz and 1 wt.% CeO2. The sample exhibited high T-c of 97 K and sharp superconducting transition when melt-processed under controlled oxygen partial pressure (P-O2) of 0.01 atm. (C) 2001 Elsevier Science B.V. All. rights reserved.
引用
收藏
页码：401 / 405
页数：5
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