Epitaxial-Strain-Induced Multiferroicity infrom First Principles
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- 20 May 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 104 (20) , 207204
- https://doi.org/10.1103/physrevlett.104.207204
Abstract
First-principles calculations reveal a large spin-phonon coupling in cubic SrMnO3, with ferromagnetic ordering producing a polar instability. Through combination of this coupling with the strain-polarization coupling characteristic of perovskites, the bulk antiferromagnetic-paraelectric ground state is driven to a previously unreported multiferroic ferroelectric-ferromagnetic state by increasing epitaxial strain. This state has a computed Ps>54\,\,$\mu${}C/cm2 and magnetic Tc>92\,\,K. Large mixed magnetic-electric-elastic responses are predicted in the vicinity of the phase boundaries.All Related Versions
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