METAL-INSULATOR TRANSITIONS IN BACO1-XNIXS2-Y

被引：71
|
作者：
MARTINSON, LS [1 ]
SCHWEITZER, JW [1 ]
BAENZIGER, NC [1 ]
机构：
[1] UNIV IOWA,DEPT CHEM,IOWA CITY,IA 52242
来源：
PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.71.125
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report on the electrical and magnetic properties of the layered ternary sulfide system BaCo1-xNixS2-y. Ni doped samples of BaCoS2 that contain sulfur vacancies exhibit a first-order phase transition from a high temperature antiferromagnetic, semiconducting phase to a low temperature metallic phase. Increasing the sulfur vacancy concentration increases the Neel temperature of the two-dimensional antiferromagnetic phase and decreases the resistivity in the metallic phase. As the Ni content is increased, the system undergoes a smooth transition to a paramagnetic metal at all temperatures.
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页码：125 / 128
页数：4
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