Effect of Co substitution on superconductivity and magnetic order in RuSr2GdCu2O8

被引：13
|
作者：
Yang, LT
Liang, JK
Liu, QL
Song, GB
Liu, FS
Luo, J
Rao, GH
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
[2] Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China
[3] Acad Sinica, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2004年 / 403卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Ru1212; X-ray diffraction; crystal structure; substitution effect;
D O I：
10.1016/j.physc.2003.12.006
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Samples of Ru1-xCoxSr2GdCu2O8 (x = 0, 0.01, 0.03, and 0.05) were synthesized by solid-state reaction. X-ray diffraction data indicate that all the samples are single phases with Ru-1212 structure. Rietveld refinement was carried out to determine the structure parameters. We present an investigation of the dc magnetic properties. The remnant magnetization at 5 K increases with the increasing of Co content, and the ferromagnetic ordering temperatures are slightly decreased with Co content increase. Substitution of Ru with Co suppresses superconductivity strikingly. The suppression of superconductivity is related to increasing ferromagnetic component in the RuO2 layers by Co doping and the decrease of the average (Ru,Co)-O bond length of (Ru,CO)O-6 octahedra. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：177 / 182
页数：6
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