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Size-driven domain reorientation in hydrothermally derived lead titanate nanoparticles

Published online by Cambridge University Press:  01 March 2005

Zhiyuan Ye ,
Elliott B. Slamovich  and
Alexander H. King
Zhiyuan Ye
Affiliation:
School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2044
Elliott B. Slamovich*
Affiliation:
School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2044
Alexander H. King
Affiliation:
School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2044
*
a)Address all correspondence to this author. e-mail: elliotts@ecn.purdue.edu
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Abstract

High-resolution transmission electron microscopy studies of hydrothermally derived platelike lead titanate nanoparticles reveal that below a critical size of approximately 70 nm, the single ferroelectric domain polarization axis reorients from perpendicular to parallel to the plate. We suggest that during particle growth, ions in the hydrothermal processing medium compensate for the ferroelectric depolarization energy. When the processing medium is removed by washing and drying, single domain nanoparticles minimize their depolarization energy by c-axis flipping.

Keywords

FerroelectricHydrothermalNanoscale

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Type
Rapid Communications
Information
Journal of Materials Research , Volume 20 , Issue 3 , March 2005 , pp. 558 - 562
Copyright
Copyright © Materials Research Society 2005

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