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Study of the dipole rotation path of BaTiO3 single crystal based on dielectric properties in structure phase transition

Zhao Xiang-Yong Chen Chao Luo Hao-Su Li Xiao-Bing Wang Yao-Jin Wang Fei-Fei

Study of the dipole rotation path of BaTiO3 single crystal based on dielectric properties in structure phase transition

Zhao Xiang-Yong, Chen Chao, Luo Hao-Su, Li Xiao-Bing, Wang Yao-Jin, Wang Fei-Fei
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  • Received Date:  07 September 2008
  • Accepted Date:  21 November 2008
  • Published Online:  05 March 2009

Study of the dipole rotation path of BaTiO3 single crystal based on dielectric properties in structure phase transition

  • 1. (1)中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室,上海 200050; (2)中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室,上海 200050;中国科学院研究生院,北京 100049

Abstract: The temperature-dependence of dielectric-constant of BaTiO3 single crystals in 〈001〉 direction is measured under different voltages and frequencies. The crystal experiences rhombohedral-orthorhombic-tetragonal phase transition with the increase of temperature. Base on the assumption of dipoles rotation and the experimental results of dielectric constant, a model is proposed, which holds that the dipoles rotation path can be inferred by the dielectric properties of the adjacent structure phase of BaTiO3. The dipoles rotation paths of rhombohedral, orthorhombic and tetragonal phases are given. The influences of bias dc electric field on the dipoles rotation path are discussed.

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