Comment on: 'Depolarization corrections to the coercive field in thin-film ferroelectrics'

The Letter by Dawber et al. [J. Phys.: Condens. Matter 15 L393 (2003)] notes that incomplete screening in the electrodes of a ferroelectric capacitor can result in an underestimate for the true coercive field in films of nanometer thickness. We show that their estimate of the magnitude of this correction it too large in the case of ferroelectric copolymer LangmuirBlodgett films and, as a result, invalidates the claim that finite-size scaling of the ferroelectric coercive field is evident in films thinner than 15 nm. Comments: 5 pages, 1 figure Subjects: Condensed Matter (cond-mat) Cite as: arXiv:cond-mat/0307293v1 Link: http://arxiv.org/abs/cond-mat/0307293v1 Submission history From: Stephen Ducharme, Fri, 11 Jul 2003 18:34:23 GMT (225kb) Comment on: “Depolarization corrections to the coercive field in thin-film ferroelectrics” Stephen Ducharme and Vladimir Fridkin 1 Department of Physics and Astronomy, Center for materials Research and Analysis, University of Nebraska, Lincoln, NE 68588-0111, USA 2 Institute of Crystallography, Russian Academy of Sciences, Moscow 153025, RUSSIA Email: [email protected] and [email protected]