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Ferroelectric domains in coarse-grained lead zirconate titanate ceramics characterized by scanning force microscopy

Published online by Cambridge University Press:  31 January 2011

J. Muñoz-Saldaña ,
M. J. Hoffmann  and
G. A. Schneider
J. Muñoz-Saldaña
Affiliation:
Advanced Ceramics Group, Technical University Hamburg-Harburg, D-21073 Hamburg, Germany
M. J. Hoffmann
Affiliation:
Institute of Ceramics in Mechanical Engineering, University of Karlsruhe, D-76131 Karlsruhe, Germany
G. A. Schneider
Affiliation:
Advanced Ceramics Group, Technical University Hamburg-Harburg, D-21073 Hamburg, Germany
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Abstract

Ferroelectric domain configurations in silver- and lanthanum-doped lead zirconate titanate (PZT) ceramics were characterized by scanning force microscopy using contact as well as piezoelectric response force [i.e., piezoelectric force microscopy (PFM)] modes. Coarse crystallites of hard and soft PZT ceramics (12 μm in Ag-PZT and 30 μm in La-PZT average grain size, respectively) with surface oriented in the {001} planes were chosen to characterize the domain configuration. Results show the conventional right-angled domain structures, which correspond to the {110} twin-related 90° and 180° domains of homogeneous width from 50 to 150 nm. The ability of PFM to image the orientation of pure in-plane arrays of domains (containing 90°-aa- and 180°-aa-types of domain boundaries) is highlighted, and a more detailed notation for in-plane domains is proposed. In addition to such periodical domain arrays, other ordered domains were found, having a misfit of 26° with respect to the{110} domain walls and the {100} surface. This array of domain walls could not be predicted with a geometrical analysis of the intersection of domain walls at the surface according to the conventional spatial array of {110} crystallographic planes. It could be explained only with {210} planes being the domain walls. The reason for this unconventional domain configuration is explained with the clamped conditions of the investigated crystallites in the polycrystalline material.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 8 , August 2003 , pp. 1777 - 1786
Copyright
Copyright © Materials Research Society 2003

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