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DS: Fachverband Dünne Schichten
DS 7: [MA] Multiferroics I (Joint Session of MA/DF/KR/DS)
DS 7.3: Vortrag
Montag, 22. März 2010, 11:00–11:15, H3
Magnetoelectric coupling at modified Fe/BaTiO3 interfaces — •Martin Hölzer1, Michael Fechner2, Sergey Ostanin2, and Ingrid Mertig1,2 — 1Martin-Luther-Universität Halle-Wittenberg, Fachbereich Physik, D-06900 Halle, Germany — 2Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
Two-component multiferroics are gaining attention within the last years. These compound materials, consisting of ferromagnetic and ferroelectric layers, combine the advantages (e. g. high curie temperatures) of their components in a tuneable magnetoelectric structure.
Ab initio DFT studies of ultrathin Fe films on ferroelectric BaTiO3 show that their magnetoelectric coupling can be enhanced considerably by means of interface alloying.
In these systems, the magnetoelectric coupling is related to structural changes in the interface region under polarisation reversal of the BaTiO3 substrate. In one of the considered cases, a magnetic phase transition with high change in the total magnetization is triggered under polarization reversal.
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