Publication Type
Journal
Journal Name
Physical Review Letters
Publication Date
Page Number
127201
Volume
103
Issue
12
Abstract
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.
