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Giant dielectric tunability properties of Sr and Sb co-doped La2NiMnO6 ceramics induced by extrinsic contribution

Authors

  • Zhenzhu Cao,

    Corresponding author
    1. Centre for Industrial Crystallization and Chemical Materials, Chemical Engineering College of Inner Mongolia University of Technology, Hohhot, P. R. China
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  • Zhi Li,

    1. Centre for Industrial Crystallization and Chemical Materials, Chemical Engineering College of Inner Mongolia University of Technology, Hohhot, P. R. China
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  • Yanfang Gao,

    Corresponding author
    1. Centre for Industrial Crystallization and Chemical Materials, Chemical Engineering College of Inner Mongolia University of Technology, Hohhot, P. R. China
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  • Jinrong Liu,

    1. Centre for Industrial Crystallization and Chemical Materials, Chemical Engineering College of Inner Mongolia University of Technology, Hohhot, P. R. China
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  • Xuezheng Ruan,

    1. Key Laboratory of Inorganic Function Material and Device, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, P. R. China
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  • Minghao Fang

    1. School of Materials Science and Technology China University of Geosciences, Beijing, P. R. China
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Abstract

La2–xSrxNiMn1–xSbxO6 (x = 0, 0.08, 0.3) ceramics were prepared by a gel combustion method. Structural, dielectric, and dielectric tunable properties were systematically investigated. A phase transition from mixed monoclinic and rhombohedral phases to monoclinic phase occurs as Sr and Sb contents increase. Impedance and frequency dependence of dielectric constant have been employed to examine the extrinsic contribution to the dielectric properties. Results reveal that the electrode effect has an important influence on the giant dielectric permittivity and dielectric tunability around room temperature.

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