Strain Effects of the Structural Characteristics of Ferroelectric Transition in Single-Domain Epitaxial BiFeO_(3) Films  

作　　者：LIU Yang PENG Xing-Ping 刘洋;朋兴平(The Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University,Lanzhou 730000)

机构地区：[1]The Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University,Lanzhou 730000

出　　处：《Chinese Physics Letters》2011年第6期283-286,共4页中国物理快报（英文版）

基　　金：the National Innovation Experiment Program for University Students(101073029).

摘　　要：Structural characteristics of phase transition in single-domain epitaxial BiFeO_(3)films are studied by the Landau–Devonshire theory.It is predicted that remanent polarization shows strong strain dependence for different temperatures while spontaneous polarization is almost independent of strain over a wide temperature(0–500°C).We also obtain the thickness dependence of the c−axis lattice parameter and Curie temperature,and make a comparison between the polarization rotation angle and the angle attributed to the structural evolution in epitaxial(001)p BiFeO_(3)films grown on SrTiO_(3)substrates.The theoretical results are in agreement with recent experimental and theoretical data.Our calculations show that the clamping effect should also be taken into account in order to depict the mechanism of the polarization rotation completely.

关 键 词：theory ROTATION TRANSITION 

分 类 号：O48[理学—固体物理]