Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session L40: Magnetism and Domain Structures in Complex Oxides
11:15 AM–2:15 PM,
Wednesday, March 6, 2019
BCEC
Room: 208
Sponsoring
Units:
GMAG DMP
Chair: Elke Arenholz, Lawrence Berkeley National Laboratory
Abstract: L40.00008 : Domain Structure and Reversal Dynamics of Magnetoelectric Antiferromagnets*
1:03 PM–1:15 PM
Presenter:
Arun Parthasarathy
(Electrical and Computer Engineering, New York University)
Authors:
Arun Parthasarathy
(Electrical and Computer Engineering, New York University)
Shaloo Rakheja
(Electrical and Computer Engineering, New York University)
Domain reversal involves switching between saturated single-domain states. This constraint does not limit the dynamic process of reversal, which can exhibit single or multi-domain switching mechanisms, or a mix of both. In general, the mechanism of domain reversal depends on material parameters like the exchange interaction and magnetic anisotropy, size and shape of the sample, structure of defects, and strength of the excitation including thermal fluctuations.
In this work, we theorize the spatial and temporal limits of ME-induced reversal of antiferromagnet domain for nucleation, domain wall propagation and coherent rotation. We also address the formation of non-trivial domain structures in equilibrium in thin film Cr2O3 (Wu, et al., Phys. Rev. Lett. 2011), despite the absence of magnetostatic interaction in the bulk.
*This work was supported in part by the SRC and the NSF through ECCS 1740136.
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