Magnetoelectric coupling in the cubic ferrimagnet Cu2OSeO3

被引：134

作者：

Bos, Jan-Willem G. ^{[1
,2
]}

Colin, Claire V. ^{[3
]}

Palstra, Thomas T. M. ^{[3
]}

机构：

[1] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland

[2] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3JJ, Midlothian, Scotland

[3] Univ Groningen, Zernike Inst Adv Mat, Solid State Chem Lab, NL-9747 AG Groningen, Netherlands

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.78.094416

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the magnetoelectric coupling in the lone pair containing piezoelectric ferrimagnet Cu2OSeO3. Significant magnetocapacitance develops in the magnetically ordered state (T-c = 60 K). We find critical behavior near T-c and a divergence near the metamagnetic transition at 500 Oe. High-resolution x-ray and neutron powder diffraction measurements show that Cu2OSeO3 is metrically cubic down to 10 K but that the ferrimagnetic ordering reduces the symmetry to rhombohedral R3. The metric cubic lattice dimensions exclude a magnetoelectric coupling mechanism involving spontaneous lattice strain, and this is unique among magnetoelectric and multiferroic materials.

引用

页数：7

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