Physics – Condensed Matter – Materials Science
Scientific paper
2009-09-15
Phys. Rev. Lett. 103, 127201 (2009)
Physics
Condensed Matter
Materials Science
4 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.103.127201
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.
Dagotto Elbio
Dong Shuai
Liang Shuhua
Liu Jian-Miin
Moreo Adriana
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