Neutron diffraction study of Nd-substituted FeSr2YCu2O6+δ magnetic superconductor

被引：2
作者：
Mochiku, T. [1 ,2 ]
Wuernisha, T. [2 ]
Hata, Y. [3 ]
Hoshikawa, A. [4 ]
Fujii, H. [1 ]
Yasuoka, H. [3 ]
Hirata, K. [1 ]
机构：
[1] Natl Inst Mat Sci, Superconducting Mat Ctr, Tsukuba, Ibaraki 3050047, Japan
[2] Natl Inst Mat Sci, Quantum Beam Ctr, Tsukuba, Ibaraki 3050047, Japan
[3] Natl Def Acad, Dept Appl Phys, Kanagawa 2398686, Japan
[4] Japan Atom Energy Agcy, J PARC Ctr, Naka, Ibaraki 3191195, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2008年 / 468卷 / 15-20期
关键词：
FeSr2YCu2O6+delta; Nd substitution; neutron powder diffraction; disorder;
D O I：
10.1016/j.physc.2008.05.026
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
FeSr2YCu2O6+delta with tetragonal Ba2YCu3O6+delta-type structure exhibits superconductivity around 60 K, only when it is annealed in reduced atmosphere and subsequently in oxidized atmosphere. However, FeSr2NdCu2O6+delta when it is annealed in reduced atmosphere and subsequently in oxidized atmosphere. However, FeSr2NdCu2O6+delta with the substitution of lanthanoid with large ionic radius for Y do not exhibit superconductivity even if it is annealed in the same process as superconducting FeSr2YCu2O6+delta. We have performed neutron powder diffraction of the FeSr2Y1-xNdxCu2O6+delta solid solution system to investigate the effect of the Nd substitution on structure and superconductivity. The structure analysis indicates that the disorder of Sr and Nd, of oxygen on double superconducting CuO2 sheets and of Cu and Fe prevents exhibiting superconductivity in the Nd-substituted system. (C) 2008 Elsevier B.V. All rights reserved.
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收藏
页码：1174 / 1177
页数：4
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