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Interface effects at a half-metal/ferroelectric junction
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
2007 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 91, no 6, 062506- p.Article in journal (Refereed) Published
Abstract [en]

Magnetoelectric effects are investigated ab initio at the interface between half-metallic and ferroelectric prototypes: Heusler Co2MnSi and perovskite BaTiO3. For the Co-termination ferroelectricity develops in BaTiO3 down to nanometer thicknesses, whereas for the MnSi termination a paraelectric and a ferroelectric state energetically compete, calling for a full experimental control over the junction atomic configuration whenever a ferroelectric barrier is needed. Switch of the electric polarization largely affects magnetism in Co2MnSi, with magnetoelectric coupling due to electronic hybridization at the MnSi termination and to the structural effects at the Co-termination. Half metallicity is lost at the interface, but recovered already in the subsurface layer.

Place, publisher, year, edition, pages
2007. Vol. 91, no 6, 062506- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-144209DOI: 10.1063/1.2767776ISI: 000248661400079OAI: oai:DiVA.org:uu-144209DiVA: diva2:392860
Available from: 2011-01-28 Created: 2011-01-28 Last updated: 2017-12-11Bibliographically approved

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Sanyal, Biplab

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