Strain-induced ferroelectricity and spin-lattice coupling in SrMn O3 thin films

J. W. Guo; P. S. Wang; Y. Yuan; Q. He; 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

doi:10.1103/PhysRevB.97.235135

Strain-induced ferroelectricity and spin-lattice coupling in SrMn O3 thin films

J. W. Guo, P. S. Wang, Y. Yuan, Q. He, 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

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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.

Original language	English (US)
Article number	235135
Journal	Physical Review B
Volume	97
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevB.97.235135
State	Published - Jun 20 2018

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.97.235135

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title = "Strain-induced ferroelectricity and spin-lattice coupling in SrMn O3 thin films",

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.",

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

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doi = "10.1103/PhysRevB.97.235135",

language = "English (US)",

volume = "97",

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T1 - Strain-induced ferroelectricity and spin-lattice coupling in SrMn O3 thin films

AU - Guo, J. W.

AU - Wang, P. S.

AU - Yuan, Y.

AU - He, Q.

AU - Lu, J. L.

AU - Chen, T. Z.

AU - Yang, S. Z.

AU - Wang, Y. J.

AU - Erni, R.

AU - Rossell, M. D.

AU - Gopalan, V.

AU - Xiang, H. J.

AU - Tokura, Y.

AU - Yu, P.

PY - 2018/6/20

Y1 - 2018/6/20

N2 - 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.

AB - 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.

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Strain-induced ferroelectricity and spin-lattice coupling in SrMn O3 thin films

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