Ferroelectricity induced by spin-dependent metal-ligand hybridization in Ba2CoGe2O7.

Murakawa, H; Onose, Y; Miyahara, S; Furukawa, N; Tokura, Y

Murakawa, H; Onose, Y; Miyahara, S; Furukawa, N; Tokura, Y.

Afiliación

Murakawa H; Multiferroics Project, ERATO, Japan Science and Technology Agency (JST), c/o Department of Applied Physics, University of Tokyo, Tokyo, Japan.

Phys Rev Lett ; 105(13): 137202, 2010 Sep 24.

Article en En | MEDLINE | ID: mdl-21230803

RESUMEN

We have investigated the variation of induced ferroelectric polarization under a magnetic field with various directions and magnitudes in a staggered antiferromagnet Ba2CoGe2O7. While the ferroelectric polarization cannot be explained by the well-accepted spin current model nor the exchange striction mechanism, we have shown that it is induced by the spin-dependent p-d hybridization between the transition metal (Co) and ligand (O) via the spin-orbit interaction. On the basis of the correspondence between the direction of electric polarization and the magnetic state, we have also demonstrated the electrical control of the magnetization direction.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2010 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos

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