EFFECTS OF LONG-RANGE INTERACTIONS ON THE FERROELECTRIC FILM |
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Authors: | Wu Yin-zhong and Li Zhen-ya |
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Institution: | Department of Physics, Suzhou University, Suzhou 215006, China; Department of Physics, Changshu College, Changshu 215500, China; CCAST (World Laboratory), P. O. Box 8730, Beijing 100080, China |
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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. |
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Keywords: | long-range interaction ferroelectric film |
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