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SKM-SYDT: SKM-Symposium Diffusionless Transformations in Magnetic and Ferroelectric Bulk and Thin Films

SKM-SYDT 1: Diffusionless Transformations in Magnetic and Ferroelectric Bulk and Thin Films

SKM-SYDT 1.2: Invited Talk

Thursday, March 17, 2011, 11:00–11:30, TRE Ma

Intermediate Phases in Perovskite Solid Solutions — •Ian Reaney¹, Clive Randall², and David Woodward³ — ¹Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, UK — ²Department of Physics, University of Warwick, Gibbet Hill Road,Coventry CV4 7AL, UK — ³144 MRL Bldg., Penn State University,University Park, PA 16802, USA

The intermediate monoclinic (M) phase in Pb(ZrxTi1-x)O3 (PZT) inbetween rhombohedral (R) and tetragonal (T) displacive variants is considered as a high profile example of a more general phenomenon in which low symmetry intermediate phases are stabilised between higher symmetry displacive variants. In the case of the M phase, the order parameter is dominated by polarisation but similar situations are reported where the order parameter is dominated by strain, amplitude of octahedral rotation or combinations thereof. This article presents examples of intermediate phases and discusses their structures and functional properties.