Effective landau-devonshire-type theory of phase transitions in ferroelectric thin films based on the tilley-zeks model

Chew, Khian Hooi and Chan, H.L.W. and Ishibashi, Y. and Shin, F.G. (2003) Effective landau-devonshire-type theory of phase transitions in ferroelectric thin films based on the tilley-zeks model. Journal of the Physical Society of Japan, 72 (11). pp. 2972-2978. ISSN 0031-9015

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Official URL: http://jpsj.ipap.jp/link?JPSJ/72/2972/

Abstract

A generalized thermodynamic theory (effective Landau-Devonshire-type theory) for ferroelectric thin films undergoing second order phase transition is developed within the framework of the Landau-Ginzburg theory via the concept of extrapolation length delta in the Tilley-Zeks model. The free energy of the Tilley-Zeks model for ferroelectric thin films is cast into a clearer and simpler form from the usual integral expression form using suitable order parameters. The target coefficients A and B for the second order and fourth order terms, respectively, of the free energy ate expressed as a function of temperature, film thickness, extrapolation length and other physical parameters. The intrinsic effects of surface on the order of phase transitions are discussed analytically with an emphasis on asymmetric films.

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Ferroelectricity, Thin films, Phase transitions, Thickness transitions, Capacitors
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Miss Malisa Diana
Date Deposited: 02 Aug 2013 01:49
Last Modified: 27 Aug 2019 07:35
URI: http://eprints.um.edu.my/id/eprint/8204

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