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Berlin 2012 – scientific programme

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DF: Fachverband Dielektrische Festkörper

DF 15: Dielectric and ferroelectric thin films

DF 15.1: Invited Talk

Thursday, March 29, 2012, 09:30–10:10, EB 107

Dielectric perovskite oxides: Always good for a surprise — •Annette Bussmann-Holder — Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, D-70569 Stuttgart, Deutschland

Dielectric perovskite oxides exhibit multiple complex phases which vary from purely displacive to order/disorder driven to precursor dynamics. Four special cases are in the focus of this talk: the cases of BaTiO3, relaxor ferroelectrics, SrTiO3 and its isotope induced ferroelectric state, and finally EuTiO3 and its mixed crystals with SrTiO3. It is shown, that for all these compounds a single model can account for the very different dynamical behaviour and that coexistences and crossovers in the dynamics occur which invalidate categorizing dielectric perovskites.

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