Vortex ferroelectric domains

Gruverman, A. and Wu, D. and Fan, H. J. and Vrejoiu, I. and Alexe, M. and Harrison, R. J. and Scott, J. F. (2008) Vortex ferroelectric domains. Journal of Physics: Condensed Matter, 20 (34). p. 342201. DOI 10.1088/0953-8984/20/34/342201

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Abstract

We show experimental switching data on microscale capacitors of lead-zirconate-titanate (PZT), which reveal time-resolved domain behavior during switching on a 100 ns scale. For small circular capacitors, an unswitched domain remains in the center while complete switching is observed in square capacitors. The observed effect is attributed to the formation of a vortex domain during polarization switching in small circular capacitors. This dynamical behavior is modeled using the Landau-Lifshitz-Gilbert equations and found to be in agreement with experiment. This simulation implies rotational motion of polarization in the xy plane, a Heisenberg-like result supported by the recent model of Naumov and Fu (2007 Phys. Rev. Lett. 98 077603), although not directly measurable by the present quasi-static measurements.

Item Type:	Article
Uncontrolled Keywords:	08AREP; IA57;
Subjects:	03 - Mineral Sciences
Divisions:	03 - Mineral Sciences
Journal or Publication Title:	Journal of Physics: Condensed Matter
Volume:	20
Page Range:	p. 342201
Identification Number:	10.1088/0953-8984/20/34/342201
Depositing User:	Sarah Humbert
Date Deposited:	20 May 2009 13:21
Last Modified:	23 Jul 2013 09:54
URI:	http://eprints.esc.cam.ac.uk/id/eprint/993

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