Regensburg 2013 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 3: Multiferroics 1 (jointly with DF, KR, MA, TT)
DS 3.10: Vortrag
Montag, 11. März 2013, 11:45–12:00, H3
Charge-mediated magnetoelectric coupling in patterned multiferroic heterostructures — •daniele preziosi1, dietrich hesse1, marin alexe1, martin wahler2, and georg schmidt2 — 1Max-Planck-Institut für Mikrostrukturphysik Weinberg 2, 06120 Halle(Saale) Germany — 2Martin-Luther-Universität Halle-Wittenberg Von-Danckelman-Platz 3, 06120 Halle(Saale) Germany
Several studies on single phase multiferroics demonstrate that the coupling between the ferroelectric and the (ferro)magnetic order parameters tends to be small. Engineering of artificially structured systems could provide a reliable way to improve the MagnetoElectric (ME) coupling. Devices based on charge-mediated ME effect represent a viable alternative. The electric field produced by the polarization of the ferroelectric material can induce, at the interface with an ultrathin strongly correlated magnetic oxide, a change in the magnetization. The ME coupling would be in this case the consequence of the spin-dependent screening of the electric field. Patterned hetero-structures of La1-xSrxMnO3 (LSMO) and PbZr0.2Ti0.8O3 (PZT) have been fabricated. Transport and magnetic measurements show that the switching of the PZT polarization influences significantly the competing electronic ground states of the LSMO, modulating the resistivity as well as the magnetization value.