Improved Structure Stability and Multiferroic Characteristics in CaTiO 3 ‐Modified BiFeO 3 Ceramics
2011; Wiley; Volume: 95; Issue: 2 Linguagem: Inglês
10.1111/j.1551-2916.2011.04824.x
ISSN1551-2916
AutoresQing Qing Wang, Zhuo Wang, Xiao Qiang Liu, Xiang Ming Chen,
Tópico(s)Dielectric properties of ceramics
ResumoBiFeO 3 multiferroic ceramics were modified by introducing CaTiO 3 . The stability of perovskite BiFeO 3 was increased by the present modification, and the single‐phase ( Bi 1 − x Ca x )( Fe 1 − x Ti x ) O 3 solid solutions were obtained when x ≥ 0.15, where the symmetry changed from R 3 c ( x ≤ 0.2) to Pbnm ( x ≥ 0.3). The ferroelectric property of BiFeO 3 was enhanced by introducing CaTiO 3 because of the reduction of leakage current and the increase of resistivity. The increased dielectric constant, decreased dielectric loss, and enhanced remnant magnetization M r were also obtained. The best combination of multiferroic characteristics were achieved at x = 0.2.
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