Al-doping-induced magnetocapacitance in the multiferroic CuCrS 2

Author： Rong-Deng Liu   Yun-Tao Liu   Dong-Feng Chen   Lun-Hua He   Li-Qin Yan   Zhi-Cui Wang   Yang Sun   Fang-Wei Wang  

Publisher： IOP Publishing

ISSN： 1674-1056

Source： Chinese Physics B, Vol.22, Iss.2, 2013-02, pp. : 27507-27510

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Abstract

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 Cr3+ ions. The negative magnetocapacitive effect reaches ~ 13% for CuAl0.02Cr0.98S2.

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