Exchange bias driven by the Dzyaloshinskii-Moriya interaction and ferroelectric polarization at G-type antiferromagnetic perovskite interfaces.
Exchange bias is usually rationalized invoking spin pinning effects caused by uncompensated antiferromagnetic interfaces. However, for compensated antiferromagnets other extrinsic factors, such as interface roughness or spin canting, have to be considered to produce a small uncompensation. As an alternative, here we propose two (related) possible mechanisms, driven by the intrinsic Dzyaloshinskii-Moriya interaction and ferroelectric polarization, for the explanation of exchange bias effects in perovskites with compensated G-type antiferromagnetism. One of the mechanisms is only active when a multiferroic material is involved and it is controllable by electric fields.
Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Shuai
S
Dong
Kunihiko
K
Yamauchi
Seiji
S
Yunoki
Rong
R
Yu
Shuhua
S
Liang
Adriana
A
Moreo
J-M
JM
Liu
Silvia
S
Picozzi
Elbio
E
Dagotto