Strain-induced ferroelectricity and spin-lattice coupling in SrMnO3 thin films

Guo, J.W.; Wang, P.S.; Yuan, Y.; He, Q.; Lu, J.L.; Chen, T.Z.; Yang, S.Z.; Wang, Y.J.; Erni, R.; Rossell, M.D.; Gopalan, V.; Xiang, H.J.; Tokura, Y.; Yu, P.

doi:10.1103/physrevb.97.235135

Strain-induced ferroelectricity and spin-lattice coupling in SrMnO3 thin films

Guo, J.W.; Wang, P.S.; Yuan, Y.; He, Q.; Lu, J.L.; Chen, T.Z.; Yang, S.Z.; Wang, Y.J.; Erni, R.; Rossell, M.D.; Gopalan, V.; Xiang, H.J.; Tokura, Y.; Yu, P.

Authors

J.W. Guo

P.S. Wang

Y. Yuan

Dr Helen He qing.he@durham.ac.uk
Assistant Professor

J.L. Lu

T.Z. Chen

S.Z. Yang

Y.J. Wang

R. Erni

M.D. Rossell

V. Gopalan

H.J. Xiang

Y. Tokura

P. Yu

Abstract

Designing novel multiferroic materials with simultaneous ferroelectric and magnetic orders has been one of the focal points over the last decade due to the promising applications and rich physics involved. In this study, using epitaxial strain (up to 3.8%) as tuning knob, we successfully introduce multiferroicity with prominent high-temperature ferroelectricity into the paraelectric SrMn O 3 . More interestingly, the experimental temperature-dependent ferroelectric and magnetic studies suggest that the emergent antiferromagnetic order below 100 K greatly enhances the ferroelectric polarization due to the spin-order-induced ionic displacements. We envision that the strain-mediated spin-phonon coupling can be utilized as a pathway to discover functionalities in a wide range of antiferromagnetic insulators with delicate epitaxial manipulations.

Citation

Guo, J., Wang, P., Yuan, Y., He, Q., Lu, J., Chen, T., …Yu, P. (2018). Strain-induced ferroelectricity and spin-lattice coupling in SrMnO3 thin films. Physical review B, 97(23), Article 235135. https://doi.org/10.1103/physrevb.97.235135

Journal Article Type	Article
Acceptance Date	Jan 6, 2018
Online Publication Date	Jun 20, 2018
Publication Date	Jun 20, 2018
Deposit Date	Jun 28, 2018
Publicly Available Date	Jun 28, 2018
Journal	Physical review B - Condensed Matter and Materials Physics
Print ISSN	1098-0121
Electronic ISSN	1550-235X
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	97
Issue	23
Article Number	235135
DOI	https://doi.org/10.1103/physrevb.97.235135
Public URL	https://durham-repository.worktribe.com/output/1327879

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Copyright Statement
Reprinted with permission from the American Physical Society: Guo, J. W., Wang, P. S., Yuan, Y., He, Q., Lu, J. L., Chen, T. Z., Yang, S. Z., Wang, Y. J., Erni, R., Rossell, M. D., Gopalan, V., Xiang, H. J., Tokura, Y. & Yu, P. (2018). Strain-induced ferroelectricity and spin-lattice coupling in SrMnO3 thin films. Physical Review B 97(23): 235135 © 2018 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.