中国物理B ›› 2001, Vol. 10 ›› Issue (11): 1058-1061.doi: 10.1088/1009-1963/10/11/313

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EFFECTS OF LONG-RANGE INTERACTIONS ON THE FERROELECTRIC FILM

李振亚1, 吴银忠2   

  1. (1)CCAST (World Laboratory), P. O. Box 8730, Beijing 100080, China; Department of Physics, Suzhou University, Suzhou 215006, China; (2)Department of Physics, Suzhou University, Suzhou 215006, China; Department of Physics, Changshu College, Changshu 215500, China
  • 收稿日期:2001-02-23 修回日期:2001-06-11 出版日期:2001-11-15 发布日期:2005-06-12
  • 基金资助:
    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).

EFFECTS OF LONG-RANGE INTERACTIONS ON THE FERROELECTRIC FILM

 Wu Yin-zhong (吴银忠)ab, Li Zhen-ya (李振亚)ca   

  1. 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
  • Received:2001-02-23 Revised:2001-06-11 Online:2001-11-15 Published:2005-06-12
  • Supported by:
    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).

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摘要： 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.

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.

Key words: long-range interaction, ferroelectric film

中图分类号:  (Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)

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