Surface_Multiferroics_PRB_1.pdf (8.29 MB)
Theory of surface-induced multiferroicity in magnetic materials, thin films, and multilayers
journal contributionposted on 2021-08-03, 09:07 authored by Ahmed TarkhanyAhmed Tarkhany, Marco DiscacciatiMarco Discacciati, Joseph BetourasJoseph Betouras
We present a theoretical study of the onset of electric polarization close to a surface in magnetic materials and in thin films and multilayers. We consider two different paths that lead to the onset of multiferroic behavior at the boundary in materials that are bulk collinear ferromagnets (or even antiferromagnets). These two paths are distinguished by the presence or absence of a surface-induced Dzyaloshinskii-Moriya interaction, which can be taken into account through Lifshitz invariants in the free energy of the system. Experimental consequences are discussed in light of the developed theory.
EPSRC Grant No. EP/P003052/1
Regional Government of Kurdistan-Iraq
EPSRC Grant No. EP/R014604/1
- Mathematical Sciences
Published inPhysical Review B
PublisherAmerican Physical Society
- AM (Accepted Manuscript)
Rights holder© American Physical Society
Publisher statementThis paper was accepted for publication in the journal Physical Review B and the definitive published version is available at https://doi.org/10.1103/PhysRevB.103.205409.