Al-doping-induced magnetocapacitance in the multiferroic CuCrS2

doi:10.1088/1674-1056/22/2/027507

Abstract In this paper, magnetic and dielectric properties of the quasi-two-dimensional triangular-lattice system CuCrS₂ and its B-site-diluted analogs CuAl_1-xCr_xS₂ (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 dopping Al. Magnetodielectric effect is found near T_N 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 Cr³⁺ ions. The negative magnetocapacitive effect reaches ～13% for CuAl_0.02Cr_0.98S₂.

Keywords: magnetocapacitance dielectric property magnetoelectric coupling antiferromagnetics

Received: 14 May 2012
Revised: 06 September 2012
Accepted manuscript online:

PACS:	75.80.+q	(Magnetomechanical effects, magnetostriction)
	77.22.-d	(Dielectric properties of solids and liquids)
	75.85.+t	(Magnetoelectric effects, multiferroics)
	75.50.Ee	(Antiferromagnetics)

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

Corresponding Authors: Wang Fang-Wei
E-mail: fwwang@aphy.iphy.ac.cn

Cite this article:

Liu Rong-Deng (刘荣灯), Liu Yun-Tao (刘蕴韬), Chen Dong-Feng (陈东风), He Lun-Hua (何伦华), Yan Li-Qin (闫丽琴), Wang Zhi-Cui (王志翠), Sun Yang (孙阳), Wang Fang-Wei (王芳卫) Al-doping-induced magnetocapacitance in the multiferroic CuCrS₂ 2013 Chin. Phys. B 22 027507

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Al-doping-induced magnetocapacitance in the multiferroic CuCrS2

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Al-doping-induced magnetocapacitance in the multiferroic CuCrS₂