三明治结构薄膜的铁电性及蒙特卡罗算法模拟  

Ferroelectricity of a Sandwich Structural Film and Its MonteCarlo Simulation

作　　者：孙玉霞[1] 刘红日[2] 

机构地区：[1]湖北师范学院计算机科学与技术学院,黄石435002 [2]湖北师范学院物理与电子科学学院,黄石435002

出　　处：《武汉理工大学学报》2011年第8期23-26,共4页Journal of Wuhan University of Technology

基　　金：教育部科学研究重点项目(209077);湖北师范学院青年项目(2010C27)

摘　　要：用溶胶-凝胶方法在Pt/Ti/SiO2/Si衬底上制备了BaTiO3/BiFeO3/BaTiO3三明治结构薄膜。XRD测试结果表明薄膜由BaTiO3相和BiFeO3相构成。通过铁电性测量在薄膜中观察到了反铁电极化。对薄膜中存在的反铁电性进行了基于伊辛模型的蒙特卡罗模拟。模拟结果表明薄膜中的反铁电性来自不同铁电层之间的反铁电耦合。BaTiO3/BiFeO3/BaTiO3 sandwich structural film is prepared on Pt/Ti/SiO2/Si substrate by sol-gel process.XRD results show that the film is composed of BaTiO3 phase and BiFeO3 phase.Antiferroelectricity is observed by measuring the hysteresis loops of the film.A simulation on the antiferroelectricity is carried out based on Ising model using MonteCArlo method.Simulating result shows that the antiferroelectricity is originated from the antiferroelectric couple between the different ferroelectric layers.

关 键 词：BaTiO3/BiFeO3/BaTiO3薄膜 反铁电性 蒙特卡罗模拟 伊辛模型 

分 类 号：TB43[一般工业技术]