Phys. Rev. Lett. 89, 067601 (2002) [4 pages]Observation of Nanoscale 180° Stripe Domains in Ferroelectric PbTiO3 Thin FilmsReceived 27 March 2002; published 19 July 2002 We report the observation of periodic 180° stripe domains below the ferroelectric transition in thin films. Epitaxial PbTiO3 films of thickness d=1.6 to 42 nm on SrTiO3 substrates were studied using x-ray scattering. Upon cooling below TC, satellites appeared around Bragg peaks indicating the presence of 180° stripe domains of period Λ=3.7 to 24 nm. The dependence of Λ on d agrees well with theory including epitaxial strain effects, while the suppression of TC for thinner films is significantly larger than that expected solely from stripe domains. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.067601
DOI:
10.1103/PhysRevLett.89.067601
PACS:
77.80.Bh, 61.10.Eq, 64.70.Nd, 68.55.–a
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