Synthesis and superconductivity of Fe0.5Cu0.5BaSrRCu2O7+δ superconductors synthesized by high pressure

被引：1
|
作者：
Liu, YH [1 ]
Che, GC [1 ]
Li, KQ [1 ]
Zhao, ZX [1 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100080, Peoples R China
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2005年 / 422卷 / 3-4期
关键词：
high-pressure synthesis; Fe0.5Cu0.5BaSrRCu2O7+delta; superconductivity; magnetic properties;
D O I：
10.1016/j.physc.2005.03.012
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this paper, the structure, oxygen content, superconductivity and magnetic properties of Fe0.5Cu0.5BaSrRCu2O7+delta superconductors (R represents rare-earth elements) synthesized by high pressure have been studied. Results indicate that all the AM- (prepared in air under ambient pressure) and the HP- (synthesized by high pressure) samples have tetragonal structure and the HP-samples have smaller lattice parameter c, unit-cell volume and more oxygen content than the AM-samples. None of the AM-samples is superconducting while superconductivity in some HP-samples was found. The HP-samples with larger rare-earth ion have lower T-c. An obvious antiferromagnetic transition has been observed in the M-T curve of Tm-based HP-sample. (c) 2005 Elsevier B.V. All rights reserved.
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页码：88 / 94
页数：7
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