Spontaneous electric polarization in the B-site magnetic spinel GeCu2O4

被引：6

作者：

Yanda, Premakumar

Ghara, Somnath

Sundaresan, A. ^{[1
]}

机构：

[1] Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Jakkur PO, Bangalore 560064, Karnataka, India

来源：

SOLID STATE COMMUNICATIONS | 2018年 / 272卷

关键词：

Oxide; High pressure synthesis; Spinel; Multiferroicity; FERROELECTRIC POLARIZATION; MULTIFERROICS;

D O I：

10.1016/j.ssc.2018.01.017

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report the observation of a spontaneous electric polarization at the antiferromagnetic ordering temperature (T-N similar to 33K) of Cu2+ ions in the B-site magnetic spinel GeCu2O4, synthesized at high pressure and high temperature. This compound is known to crystallize in a tetragonal structure (space group I4(1)/amd) due to Jahn-Teller distortion of Cu2+ ions and exhibit a collinear up-up-down-down (up arrow up arrow down arrow down arrow) antiferromagnetic spin configuration below T-N. We found a clear dielectric anomaly at T-N, where an electric polarization appears in the absence of applied magnetic field. The electric polarization is suppressed by applied magnetic fields, which demonstrates that the compound GeCu2O4 is a type-II multiferroic.

引用

页码：53 / 56

页数：4

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