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Strain-induced ferroelectricity and spin-lattice coupling in SrMn O 3 thin films

DOI: 10.1103/PhysRevB.97.235135 DOI Help

Authors: J. W. Guo (Tsinghua University) , P. S. Wang (Fudan University) , Y. Yuan (Pennsylvania State University) , Q. He (Durham University) , J. L. Lu (Fudan University) , T. Z. Chen (Tsinghua University) , S. Z. Yang (Tsinghua University) , Y. J. Wang (Tsinghua University) , R. Erni (Swiss Federal Laboratories for Materials Science and Technology) , M. D. Rossell (Swiss Federal Laboratories for Materials Science and Technology) , V. Gopalan (Pennsylvania State University) , H. J. Xiang (Fudan University; Collaborative Innovation Center of Advanced Microstructures) , Y. Tokura (RIKEN Center for Emergent Matter Science (CEMS)) , P. Yu (Tsinghua University; RIKEN Center for Emergent Matter Science (CEMS); Collaborative Innovation Center of Quantum Matter)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 97

State: Published (Approved)
Published: June 2018

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 SrMnO3. 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.

Subject Areas: Materials, Physics


Instruments: I06-Nanoscience