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DF: Fachverband Dielektrische Festkörper

DF 12: Poster II

DF 12.13: Poster

Mittwoch, 25. März 2009, 09:30–12:30, P5

Microstructure control in PZT/(111)-Pt heterostructures — •Salah Habouti¹, Claus-Henning Solterbeck¹, Vladimir Zaporojtchenko², Franz Faupel², and Mohammed Es-Souni¹ — ¹Institute for Materials and Surface Technology, University of Applied Sciences Kiel — ²Chair for Multicomponent Materials, Christian-Albrechts-Universtät zu Kiel

Investigations of film formation of Pb(Zr_0.52Ti_0.48)O₃ (PZT) on Pt (111) shows that an interfacial intermetallic layer, Pt_xPb, forms as well under oxidizing and reducing atmosphere when the films are subjected to an intermediate annealing step at 550^∘C. The formation of the intermetallic layer controls further crystallization and growth of the perovskite phase and confers to it a pronounced (111) texture at the fairly low annealing temperature of 600^∘C. The crystallization of the morphotropic PZT phase is shown to initiate via incipient formations of a Ti-rich tetragonal phase at the interface with the intermetallic interfacial layer. The results are discussed in terms of thermodynamics and kinetic of phase formation.