Ferroelectricity induced by acentric spin-density waves in YMn2O5.
Phys Rev Lett
; 96(9): 097601, 2006 Mar 10.
Article
en En
| MEDLINE
| ID: mdl-16606315
ABSTRACT
The commensurate and incommensurate magnetic structures of the magnetoelectric system YMn2O5, as determined from neutron diffraction, were found to be spin-density waves lacking a global center of symmetry. We propose a model, based on a simple magnetoelastic coupling to the lattice, which enables us to predict the polarization based entirely on the observed magnetic structure. Our data accurately reproduce the temperature dependence of the spontaneous polarization, particularly its sign reversal at the commensurate-incommensurate transition.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Phys Rev Lett
Año:
2006
Tipo del documento:
Article
País de afiliación:
Reino Unido