Orbital-Ordering-Driven Multiferroicity and Magnetoelectric Coupling in GeV4S8

被引：52

作者：

Singh, Kiran ^{[1
]}

Simon, Charles ^{[1
,2
]}

Cannuccia, Elena ^{[2
]}

Lepetit, Marie-Bernadette ^{[2
,3
]}

Corraze, Benoit ^{[4
]}

Janod, Etienne ^{[4
]}

Cario, Laurent ^{[4
]}

机构：

[1] ENSICAEN, CNRS UMR 6508, Lab CRISMAT, F-14050 Caen 4, France

[2] Inst Max Von Laue Paul Langevin, F-38000 Grenoble, France

[3] Inst Neel, CNRS UPR 2940, Dept MCBT, F-38042 Grenoble 9, France

[4] Univ Nantes, CNRS, Inst Mat Jean Rouxel, F-44322 Nantes 3, France

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 13期

关键词：

MOTT INSULATORS; AVALANCHE BREAKDOWN; SUPERCONDUCTIVITY; FERROELECTRICITY; CRYSTAL;

D O I：

10.1103/PhysRevLett.113.137602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report here the discovery of multiferroicity and large magnetoelectric coupling in the type I orbital order system GeV4S8. Our study demonstrates that this clustered compound displays a para-ferroelectric transition at 32 K. This transition originates from an orbital ordering which reorganizes the charge within the transition metal clusters. Below the antiferromagnetic transition at 17 K, the application of a magnetic field significantly affects the ferroelectric polarization, revealing thus a large magnetoelectric coupling. Our study suggests that the application of a magnetic field induces a metamagnetic transition which significantly affects the ferroelectric polarization thanks to an exchange striction phenomenon.

引用

页数：5

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