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Theory of surface-induced multiferroicity in magnetic materials, thin films, and multilayers

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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.

Funding

EPSRC Grant No. EP/P003052/1

Regional Government of Kurdistan-Iraq

EPSRC Grant No. EP/R014604/1

History

School

  • Science

Department

  • Mathematical Sciences
  • Physics

Published in

Physical Review B

Volume

103

Issue

20

Publisher

American Physical Society

Version

AM (Accepted Manuscript)

Rights holder

© American Physical Society

Publisher statement

This 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.

Acceptance date

16/04/2021

Publication date

2021-05-10

Copyright date

2021

ISSN

2469-9950

eISSN

2469-9969

Language

en

Depositor

Dr Marco Discacciati. Deposit date: 28 July 2021

Article number

205409