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.

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., Yang, S., Wang, Y., Erni, R., Rossell, M., Gopalan, V., Xiang, H., Tokura, Y., & Yu, P. (2018). Strain-induced ferroelectricity and spin-lattice coupling in SrMnO3 thin films. Physical review B - Condensed Matter and Materials Physics, 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