Theoretical study of dielectric susceptibility in ferroelectric thin films

Citation
Pf. Nie et al., Theoretical study of dielectric susceptibility in ferroelectric thin films, PHYS LETT A, 290(3-4), 2001, pp. 176-180
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
0375-9601 → ACNP
Volume
290
Issue
3-4
Year of publication
2001
Pages
176 - 180
Database
ISI
SICI code
0375-9601(20011112)290:3-4<176:TSODSI>2.0.ZU;2-6
Abstract
Based on a pseudospin-phonon interaction model dielectric susceptibility in ferroelectric thin films was studied by using double-time Green's function s method. The dielectric susceptibility peak shifts up to higher temperatur e with increasing the pseudospin-phonon coupling. Critical pseudospin-phono n couplings were obtained. Below the critical coupling Curie temperature fo r the film is lower than that for the bulk and the transition temperature f or the film decreases with decreasing the film thickness: above the critica l coupling Curie temperature for the film is higher than that for the bulk and the transition temperature for the film increases with decreasing the f ilm thickness. (C) 2001 Elsevier Science B.V. All rights reserved.