Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session A53: Multiferroics, Magnetoelectrics, Spin-Electric Coupling, and Ferroelectrics - 1
8:00 AM–10:36 AM,
Monday, March 15, 2021
Sponsoring
Units:
DMP DCOMP GMAG
Chair: Turan Birol, University of Minnesota
Abstract: A53.00003 : Giant Linear Magnetoelectric Effect at the Morphotropic Phase Boundary of Epitaxial Sr0.5Ba0.5MnO3 films*
8:24 AM–8:36 AM
Live
Presenter:
Temuujin Bayaraa
(Department of Physics, University of Arkansas)
Authors:
Temuujin Bayaraa
(Department of Physics, University of Arkansas)
Yurong Yang
(Department of Materials Science and Engineering, Nanjing University)
Meng Ye
(Department of Physics, Tsinghua University)
Laurent Bellaiche
(Department of Physics, University of Arkansas)
In this work, first-principles calculations are conducted to compute linear magnetoelectric coupling coefficients in epitaxial (001) Sr0.5Ba0.5MnO3 films. A large enhancement of different linear magnetoelectric elements is found in a strained-induced morphotropic phase boundary region which bridges two known tetragonal and orthorhombic states, via a monoclinic state with the continuous rotation of the spontaneous polarization.
The origin of such large enhancement found to originate from the behavior of the dielectric susceptibility, thanks to a simple phenomenological model. Magnetic susceptibility was also determined to influence the linear magnetoelectric coupling. This work provides a promising approach towards designing highly-desired single-phase multiferroic with a colossal magnetoelectric conversion.
*This work is supported by the Department of Energy, Office of Basic Energy Sciences, under Award No. DE-SC0002220. Y. Y. acknowledges the support from NSFC (11874207).
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