Reference : Engineering Multiferroism in CaMnO3
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/31114
Engineering Multiferroism in CaMnO3
English
Bhattacharjee, Satadeep [> > > >]
Bousquet, Eric mailto [Université de Liège - ULg > Département de physique > Physique théorique des matériaux >]
Ghosez, Philippe mailto [Université de Liège - ULg > Département de physique > Physique théorique des matériaux >]
2009
Physical Review Letters
American Physical Society
102
117602
Yes (verified by ORBi)
International
0031-9007
1079-7114
Ridge
NY
[en] Structural instabilities of CaMnO3 are investigated from first principles. We point out that, on top of a strong antiferrodistortive instability responsible for its orthorhombic ground state, the cubic perovskite structure of CaMnO3 also exhibits a weak ferroelectric instability. Although ferroelectricity is suppressed by antiferrodistortive motions, we show that it can be favored using strain or chemical engineering in order to make CaMnO3 multiferroic. We finally highlight that the ferroelectric instability of CaMnO3 is Mn-dominated. This illustrates that, contrary to common belief, ferroelectricity and magnetism are not necessarily exclusive but can be driven by the same cation.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/31114
10.1103/PhysRevLett.102.117602

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