Metal-insulator transition in the spinel-type Cu(Ir1-xPtx)2S4 system

被引：14
|
作者：
Matsumoto, N [1 ]
Yamauchi, Y [1 ]
Awaka, J [1 ]
Kamei, Y [1 ]
Takano, H [1 ]
Nagata, S [1 ]
机构：
[1] Muroran Inst Technol, Dept Mat Sci & Engn, Muroran, Hokkaido 0508585, Japan
来源：
INTERNATIONAL JOURNAL OF INORGANIC MATERIALS | 2001年 / 3卷 / 07期
关键词：
sulfide; metal-insulator transition; electrical resistivity; magnetic susceptibility; powder X-ray diffraction;
D O I：
10.1016/S1466-6049(01)00180-5
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A normal thiospinel CuIr2S4 exhibits a temperature-induced metal-insulator (M-I) transition around 226 K with crystal structure transformation. In order to study gradual variations of the M-I transition by gentle chemical modification with increasing the number of 5d electron, we have prepared the polycrystalline samples of Cu(Ir1-xPtx)(2)S-4 and have investigated the electrical and magnetic properties of these samples. The features of the M-I transition in the electrical resistivity vary gradually with Pt concentration x. No structural transformation has been observed for x=0.25 and 0.30, where the abrupt jump disappears in the resistivity and the magnetic susceptibility around the transition temperature. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：791 / 795
页数：5
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