Redistribution of Fe ion and superconductivity of FeSr2YCu2O6+y system

被引：18
作者：
Hata, Y
Mihara, Y
Mochiku, T
Suzuki, J
Kakeya, I
Kadowaki, K
Kita, E
Yasuoka, H
机构：
[1] Natl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan
[2] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan
[3] Natl Inst Mat Sci, Supercond Mat Ctr, Tsukuba, Ibaraki 3050047, Japan
[4] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
[5] Univ Tsukuba, Inst Phys Appl, Tsukuba, Ibaraki 3058573, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2004年 / 417卷 / 1-2期
关键词：
FeSr2YCu2O6+y; Fe-1212; magnetic superconductor; Fe-57 Mossbauer spectroscopy;
D O I：
10.1016/j.physc.2004.10.002
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Superconductivity was observed in FeSr2YCu2O6+y compounds with the reoxidization annealing and the high pressure O-2 annealing. The sueprconducting transition temperature of the sample annealed in O-2 of 195atm is 56K. Fe-57 Mossbauer spectroscopy study revealed a suppression of Fe distribution to the Cu(2) site by the reoxidization annealing, The reoxidization annealing modifies the distribution of Fe ion and the high pressure O-2 annealing introduces holes for superconductivity to the CuO2 planes. A Curie-Weiss like temperature dependence of the magnetic susceptibility was observed in the susceptibility measurement and the effective Bohr magneton is estimated to 3.3mu(B). A broad peak at around 20K was observed and it implies the occurrence of some magnetic ordering. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：17 / 24
页数：8
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