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Chin. Phys. B, 2010, Vol. 19(12): 127701    DOI: 10.1088/1674-1056/19/12/127701
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Epitaxy surface effect on the first-order phase transition properties in a ferroelectric thin film

Lu Zhao-Xin(卢兆信)a), Teng Bao-Hua(滕保华)a), Yang Xin(杨新)a), Rong Yong-Hui(戎永辉) a), and Zhang Huai-Wu(张怀武)b)
a School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China; b School of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
Abstract  By modifying the interchange interactions and the transverse fields on the epitaxy surface layer, this paper studies the phase transition properties of an n-layer ferroelectric thin film by the Fermi-type Green's function technique based on the transverse Ising model with a four-spin interaction. The special attention is given to the effect of the epitaxy surface layer on the first-order phase transition properties in the parameter space constructed by the ratios of the bulk transverse field and the bulk four-spin interaction to the bulk two-spin interaction with the framework of the higher-order decoupling approximation to the Fermi-type Green's function. The results show that the first-order phase transition properties will be changed significantly due to the modification of interchange interaction and transverse field parameters on the epitaxy surface layer. The dependence of the first-order phase transition properties on the thickness of ferroelectric thin films is also discussed.
Keywords:  ferroelectric thin film      phase diagram  
Received:  08 June 2010      Revised:  16 July 2010      Accepted manuscript online: 
PACS:  75.10.Hk (Classical spin models)  
  77.55.+f  
  77.80.Bh  
Fund: Project supported partly by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 60721001).

Cite this article: 

Lu Zhao-Xin(卢兆信), Teng Bao-Hua(滕保华), Yang Xin(杨新), Rong Yong-Hui(戎永辉), and Zhang Huai-Wu(张怀武) Epitaxy surface effect on the first-order phase transition properties in a ferroelectric thin film 2010 Chin. Phys. B 19 127701

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