尖晶石型Cu(Ir1−xPtx)2S4体系中的金属-绝缘体转变

Nobuhiro Matsumoto, Yasuhiro Yamauchi, Junji Awaka, Yasushi Kamei, Hideaki Takano, Shoichi Nagata
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引用次数: 8

摘要

正常硫尖晶石CuIr2S4在226 K左右发生温度诱导金属-绝缘体(M-I)转变,晶体结构发生转变。为了研究Cu(Ir1−xPtx)2S4的M-I跃迁随5d电子数的增加而发生的变化,我们制备了Cu(Ir1−xPtx)2S4多晶样品,并研究了这些样品的电学和磁性能。电阻率的M-I跃迁特征随Pt浓度x的变化而逐渐变化,当x=0.25和0.30时未观察到结构转变,在转变温度附近电阻率和磁化率的突变跳变消失。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Metal–insulator transition in the spinel-type Cu(Ir1−xPtx)2S4 system

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)2S4 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.

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