Ab Initio Study of the Intrinsic Exchange Bias at the SrRuO$_3$/SrMnO$_3$ Interface

Details Ab Initio Study of the Intrinsic Exchange Bias at the SrRuO$_3$/SrMnO$_3$ Interface Ab Initio Study of the Intrinsic Exchange Bias at the SrRuO$_3$/SrMnO$_3$ Interface

2011-12-21

arxiv.org/abs/1112.4916v1

Physical Review B 84, 224437 (2011)

Physics

Condensed Matter

Materials Science

7 pages, 3 figures; Accepted by PRB

Scientific paper

10.1103/PhysRevB.84.224437

In a recent publication (S. Dong et al., Phys. Rev. Lett.103, 127201 (2009)), two (related) mechanisms were proposed to understand the intrinsic exchange bias present in oxides heterostructures involving G-type antiferromagnetic perovskites. The first mechanism is driven by the Dzyaloshinskii-Moriya interaction, which is a spin-orbit coupling effect. The second is induced by the ferroelectric polarization, and it is only active in heterostructures involving multiferroics. Using the SrRuO$_3$/SrMnO$_3$ superlattice as a model system, density-functional calculations are here performed to verify the two proposals. This proof-of-principle calculation provides convincing evidence that qualitatively supports both proposals.

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