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Thickness dependency of 180° stripe domains in ferroelectric ultrathin films: A first-principles-based study

Appl. Phys. Lett. 91, 152909 (2007); doi:10.1063/1.2799252

Published 12 October 2007

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Bo-Kuai Lai, Inna Ponomareva, Igor Kornev, L. Bellaiche, and Greg Salamo
Physics Department, University of Arkansas, Fayetteville, Arkansas 72701, USA
A first-principles-based scheme is used to investigate the thickness dependency of domain width of 180° stripe domains in Pb(Zr,Ti)O3 ultrathin films. Our study shows that (1) more metastable states with energy closer to the 180° stripe domain ground state occur in thicker films, (2) the Kittel law is valid for 180° stripe domains when the film thickness is above 1.6  nm, and (3) below 1.2  nm, the Kittel law cannot be applied anymore due to the disappearance of domains. The thickness dependency of the domain morphology is also discussed. ©2007 American Institute of Physics
History: Received 22 August 2007; accepted 25 September 2007; published 12 October 2007
Permalink: http://link.aip.org/link/?APPLAB/91/152909/1
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KEYWORDS and PACS

Keywords
PACS
  • 77.84.Dy
    Dielectric, piezoelectric, and ferroelectric niobates, titanates, tantalates, PZT ceramics, etc
  • 77.55.+f
    Dielectric thin films
  • 77.80.Dj
    Ferroelectric domain structure; hysteresis
  • YEAR: 2007

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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