[en] Multiferroics are materials with coexisting magnetic and ferroelectric orders, which show potential for electrically controlled spintronic devices. A common application of ferroelectrics is in electro-optical modulators exploiting their electric-field-dependent optical indices. The coupling of optical and magnetic degrees of freedom is attractive for designing multifunctional devices, but to date the electro-optical response of multiferroics has hardly been explored. Here we report a joint experimental and theoretical study of this effect in multiferroic BiFeO3 thin films. We confirm the large birefringence present in single crystals and determine the electro-optic coefficients r13 and r33. We present approaches to increase the obtained coefficients, for instance, by using tetragonal-like BiFeO3, and expand the potential of multiferroics to optical applications.
Disciplines :
Physics
Author, co-author :
Sando, D.
Hermet, Patrick ; Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Allibe, J.
Bourderionnet, J.
Fusil, S.
Carrétéro, C.
Jacquet, E.
Mage, J.-C.
Dolfi, D.
Barthélémy, A.
Ghosez, Philippe ; Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Bibes, M.
Language :
English
Title :
Linear electro-optic effect in multiferroic BiFeO3 thin films
Publication date :
2014
Journal title :
Physical Review. B, Condensed Matter and Materials Physics
ISSN :
1098-0121
eISSN :
1550-235X
Publisher :
American Physical Society, Woodbury, United States - New York
Volume :
89
Pages :
195106
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
Tier-1 supercomputer CÉCI : Consortium des Équipements de Calcul Intensif
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