Magnetoelectric coupling in the cubic ferrimagnet Cu(2)OSeO(3)

Jan-Willem G. Bos, Claire V. Colin, Thomas T.M. Palstra

Research output: Contribution to journalArticleAcademicpeer-review

112 Citations (Scopus)

Abstract

We have investigated the magnetoelectric coupling in the lone pair containing piezoelectric ferrimagnet Cu(2)OSeO(3). 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 Cu(2)OSeO(3) 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.
Original languageEnglish
Article number094416
Number of pages7
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume78
DOIs
Publication statusPublished - Sep 2008
Externally publishedYes

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