EFFECTS OF LONG-RANGE INTERACTIONS ON THE FERROELECTRIC FILM
Wu Yin-zhong (吴银忠)ab, Li Zhen-ya (李振亚)ca
a Department of Physics, Suzhou University, Suzhou 215006, China; b Department of Physics, Changshu College, Changshu 215500, China; c CCAST (World Laboratory), P. O. Box 8730, Beijing 100080, China
Abstract The effect of long-range interactions on the spontaneous polarization and the Curie temperature of the ferroelectric film is investigated by use of the Landau theory. On the assumption that the nearest-neighbour interaction remains constant, we find that the spontaneous polarization and the phase transition temperature increase with the enhancement of the long-range interactions. In the case of positive extrapolation length, the critical thickness of the ferroelectric film, in which a size-driven phase transition occurs, decreases with the enhancement of the long-range interactions.
Received: 23 February 2001
Revised: 11 June 2001
Accepted manuscript online:
PACS:
77.84.-s
(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 19774042) and the Natural Science Foundation of Jiangsu Education Committee of China (Grant No. 00KJB14009).
Cite this article:
Wu Yin-zhong (吴银忠), Li Zhen-ya (李振亚) EFFECTS OF LONG-RANGE INTERACTIONS ON THE FERROELECTRIC FILM 2001 Chinese Physics 10 1058
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