Dresden 2009 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 15: Thin Films and Nanostructures II

DF 15.6: Vortrag

Donnerstag, 26. März 2009, 12:20–12:40, WIL B321

Effects of rare earth manganite on structural, magnetic and ferroelectric properties of BiFeO₃ thin films — •Abdelilah Lahmar, Salah Habouti, Matthias Dietze, Claus-Henning Solterbeck, and Mohammed Es-Souni — Institute for Materials and Surface Technology, University of Applied Sciences Kiel, Germany

The results of structural studies of pure-phase perovskite thin films of BiFeO₃ – 10% RMnO₃ (R= La, Eu, Gd, Tb and Dy) are presented. Raman Scattering studies show lines broadening similar to what is reported for RMnO₃; they were attributed to Jahn-Teller distortion and orthorhombic structural change. Evidence of an anomaly of the orthorhombic distortion at GdMnO₃ could be obtained. Interestingly the addition of GdMnO₃ leads to a substantial increase in magnetization, combined with moderate ferroelectric polarization. All other compositions are characterized by higher ferroelectric polarization but almost no magnetization.