Article (Scientific journals)
Evidence for Room-Temperature Multiferroicity in a Compound with a Giant Axial Ratio
Béa, Hélène; Dupé, Bertrand; Fusil, Stéphane et al.
2009In Physical Review Letters, 102 (21), p. 217603
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Keywords :
BFO; DFT; PFM; multiferoics; strain-effect; tiltings BFO; tiltings
Abstract :
[en] In the search for multiferroic materials magnetic compounds with a strongly elongated unit-cell (large axial ratio c/a) have been scrutinized intensely. However, none was hitherto proven to have a switchable polarization, an essential feature of ferroelectrics. Here, we provide evidence for the epitaxial stabilization of a monoclinic phase of BiFeO3 with a giant axial ratio (c/a=1.23) that is both ferroelectric and magnetic at room temperature. Surprisingly, and in contrast with previous theoretical predictions, the polarization does not increase dramatically with c/a. We discuss our results in terms of the competition between polar and antiferrodistortive instabilities and give perspectives for engineering multiferroic phases.
Disciplines :
Physics
Author, co-author :
Béa, Hélène
Dupé, Bertrand  ;  Université de Liège - ULiège > Département de physique > Physique des matériaux et nanostructures
Fusil, Stéphane
Mattana, R.
Jacquet, Eric
Warot-Fonrose, B.
Wilhelm, F.
Rogalev, Andrei
Petit, Sylvain
Cros, Vincent
Anane, A.
Petroff, Frédéric
Bouzehouane, Karim
Geneste, Grégorie
Dkhil, Brahim
Lisenkov, S.
Ponomareva, Inna
Bellaiche, Laurent
Bibes, Manuel
Barthélémy, Agnès
More authors (10 more) Less
Language :
English
Title :
Evidence for Room-Temperature Multiferroicity in a Compound with a Giant Axial Ratio
Publication date :
2009
Journal title :
Physical Review Letters
ISSN :
0031-9007
eISSN :
1079-7114
Publisher :
APS
Volume :
102
Issue :
21
Pages :
217603
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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