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Improved Structure Stability and Multiferroic Characteristics in CaTiO 3 ‐Modified BiFeO 3 Ceramics
Author(s) -
Wang Qing Qing,
Wang Zhuo,
Liu Xiao Qiang,
Chen Xiang Ming
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04824.x
Subject(s) - multiferroics , materials science , ferroelectricity , dielectric , ceramic , single phase , perovskite (structure) , electrical resistivity and conductivity , analytical chemistry (journal) , crystallography , chemistry , composite material , electrical engineering , optoelectronics , chromatography , engineering
BiFeO 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.