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    Effects of oxygen vacancies on polarization stability of barium titanate

    Access Status
    Fulltext not available
    Authors
    Wang, J.
    Shen, Y.
    Song, F.
    Ke, F.
    Bai, Y.
    Lu, Chunsheng
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Wang, J. and Shen, Y. and Song, F. and Ke, F. and Bai, Y. and Lu, C. 2016. Effects of oxygen vacancies on polarization stability of barium titanate. Science China: Physics, Mechanics and Astronomy. 59 (3): 634602.
    Source Title
    Science China: Physics, Mechanics and Astronomy
    DOI
    10.1007/s11433-015-5754-8
    ISSN
    1674-7348
    School
    Department of Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/36840
    Collection
    • Curtin Research Publications
    Abstract

    © 2016, Science China Press and Springer-Verlag Berlin Heidelberg. Oxygen vacancy, a kind of native point defects in ferroelectric ceramics, usually causes an increase of the dielectric loss. Based on experimental observations, it is believed that all of the oxygen vacancies are an unfavorable factor for energy saving. By using molecular dynamics simulations, we show that the increase of coercive and saturated electric fields is due to the difficulty to switch local polarization near an oxygen vacancy, and so that a ferroelectric device has to sustain the rising consumption of energy. The simulation results also uncover how oxygen vacancies influence ferroelectric properties.

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