Nanodomain faceting in ferroelectrics

Scott, J. F. and Gruverman, A. and Wu, D. and Vrejoiu, I. and Alexe, M. (2008) Nanodomain faceting in ferroelectrics. Journal of Physics: Condensed Matter, 20 (42). p. 425222. DOI

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We show that after long times (24 h), individual circular domains in 50 nm thick [001] epitaxial films of ferroelectric lead zirconate titanate (PZT) develop facets due to the crystalline anisotropy, e.g. along [100] directions. This appears to be a creep process (Tybell et al 2002 Phys. Rev. Lett. 89 097601; Paruch et al 2006 J. Appl. Phys. 100 051608) and was first seen in a nanoarray of 180deg domains (Ganpule et al 2002 Phys. Rev. B 65 014101). The effect is independent of polarity and thus rules out any electronic dependence on different work functions for top and bottom electrodes. The phenomenon is interpreted instead as a mechanical relaxation due to highly inhomogeneous stress distributions on the nanodisks, assumed to have stress-free edges.

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. 425222
Identification Number:
Depositing User: Sarah Humbert
Date Deposited: 30 May 2009 11:52
Last Modified: 23 Jul 2013 09:55

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