Al-doping-induced magnetocapacitance in the multiferroic CuCrS_2  

作　　者：刘荣灯 刘蕴韬 陈东风 何伦华 闫丽琴 王志翠 孙阳 王芳卫 

机构地区：[1]China Institute of Atomic Energy [2]State Key Laboratory of Magnetism,Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics B》2013年第2期477-480,共4页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China (Grant No. 2010CB833102);the National Natural Science Foundation of China (Grant No. 10974244)

摘　　要：In this paper,magnetic and dielectric properties of the quasi-two-dimensional triangular-lattice system CuCrS2 and its B-site-diluted analogs CuAl1-xCrxS2（x = 0.01 and x = 0.02） are investigated.Antiferromagnetic phase transition is observed at about 38.5 K by magnetization measurement without shift induced by a small amount of doping Al.Magnetodielectric effect is found near TN in each of the three compounds.The dielectric constant decreases and the magnetocapacitance increases with the increase of substitution of nonmagnetic Al3＋ ions for the magnetic Cr^3＋ ions.The negative magnetocapacitive effect reaches ～ 13% for CuAl0.02Cr0.98S2.In this paper,magnetic and dielectric properties of the quasi-two-dimensional triangular-lattice system CuCrS2 and its B-site-diluted analogs CuAl1-xCrxS2（x = 0.01 and x = 0.02） are investigated.Antiferromagnetic phase transition is observed at about 38.5 K by magnetization measurement without shift induced by a small amount of doping Al.Magnetodielectric effect is found near TN in each of the three compounds.The dielectric constant decreases and the magnetocapacitance increases with the increase of substitution of nonmagnetic Al3＋ ions for the magnetic Cr^3＋ ions.The negative magnetocapacitive effect reaches ～ 13% for CuAl0.02Cr0.98S2.

关 键 词：MAGNETOCAPACITANCE dielectric property magnetoelectric coupling ANTIFERROMAGNETICS 

分 类 号：O482.5[理学—固体物理]