Improved Structure Stability and Multiferroic Characteristics in CaTiO3-Modified BiFeO3 Ceramics

Authors

  • Qing Qing Wang,

    1. Laboratory of Dielectric Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, China
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  • Zhuo Wang,

    1. Laboratory of Dielectric Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, China
    2. School of Materials Science and Engineering, Shannxi University of Science and Technology, Xi'an, China
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  • Xiao Qiang Liu,

    1. Laboratory of Dielectric Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, China
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  • Xiang Ming Chen

    Corresponding author
    • Laboratory of Dielectric Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, China
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    • Members, The American Ceramic Society.

  • The present work was supported by National Science Foundation of China under grant number 50832005.

Author to whom correspondence should be addressed. e-mail: xmchen59@zju.edu.cn

Abstract

BiFeO3 multiferroic ceramics were modified by introducing CaTiO3. The stability of perovskite BiFeO3 was increased by the present modification, and the single-phase (Bi1 − xCax)(Fe xTix)O3 solid solutions were obtained when x ≥ 0.15, where the symmetry changed from R3c ( 0.2) to Pbnm ( 0.3). The ferroelectric property of BiFeO3 was enhanced by introducing CaTiO3 because of the reduction of leakage current and the increase of resistivity. The increased dielectric constant, decreased dielectric loss, and enhanced remnant magnetization Mr were also obtained. The best combination of multiferroic characteristics were achieved at = 0.2.

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