Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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Fabrication and Characterization of (1-x)BiFeO3-xBaTiO3 Ceramics Prepared by a Solid State Reaction Method

  • Chandarak, S. (School of Ceramic Engineering, Suranaree University of Technology) ;
  • Unruan, M. (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University) ;
  • Sareein, T. (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University) ;
  • Ngamjarurojana, A. (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University) ;
  • Maensiri, S. (Department of Physics, Faculty of Science, Khon Kaen University) ;
  • Laoratanakul, P. (National Metal and Materials Technology Center (MTEC)) ;
  • Ananta, S. (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University) ;
  • Yimnirun, R. (School of Physics, Institute of Science, Suranaree University of Technology)
  • Published : 2009.09.30
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Abstract

In this study, BiFe$O_3$-BaTi$O_3$ ceramics have been fabricated by a solid-state reaction method. The effects of BaTi$O_3$ content in the (1-x)BiFe$O_3$-xBaTi$O_3$ (x = 0.1, 0.2, 0.25, 0.3, 0.4, 0.5) system on crystal structure and magnetic, dielectric, and ferroelectric properties were investigated. Perovskite BiFe$O_3$ was stabilized through the formation of a solid solution with BaTi$O_3$. Rhombohedrally distorted structure (1-x)BiFe$O_3$-xBaTi$O_3$ ceramics showed strong ferromagnetism at x = 0.5. Dielectric and ferroelectric properties of the BiFe$O_3$-BaTi$O_3$ system also changed significantly upon addition of BaTi$O_3$. It was found that the maximum dielectric and ferroelectric properties were exhibited in the (1-x)BiFe$O_3$-xBaTi$O_3$ system at x = 0.25. This suggested the morphotropic phase boundary (MPB) with the coexistence of both rhombohedral and cubic phases of the (1-x)BiFe$O_3$-xBaTi$O_3$ system at x = 0.25.

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