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Berlin 2012 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 10: Multiferroics II: Hexagonal manganites / Incommensurate multiferroics (jointly with MA, DF, KR, TT)

DS 10.4: Vortrag

Montag, 26. März 2012, 16:00–16:15, EB 301

Direct observation of multiferroicity in TbMnO3 thinfilms — •Artur Glavic1, Jörg Voigt1, Enrico Schierle2, Eugen Weschke2, and Thomas Brückel11Jülich Centre for Neutron Science JCNS and Peter Grünberg Institut PGI, JARA-FIT, Forschungszeutrum Jülich GmbH, Jülich, Germany — 2Helmholtz-Zentrum Berlin für Materialien und Energie, BESSY II, Albert-Einsteinstr. 15, Berlin, Germany

Multiferroic rare earth manganites as TbMnO3 have been studied a lot in the past ten years because of their complex magnetic structure, which leads to a ferroelectric polarization. So far investigations on TbMnO3 thin films grown on LaAlO3 or SrTiO3 showed an emergent ferromagnetism, destroying the multiferroic properties.

We have investigated TbMnO3 films grown with sputter deposition on YAlO3 substrates using soft x-ray resonant magnetic scattering with linear and circular polarized light. By measuring the circular dichroism originating from the chirality of the magnetic structure we could directly observe multiferroic domains in the thin films. Although the transition temperatures found were comparable to bulk, an additional influence of the Tb magnetic order on the ferroelectricity was observed.

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