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Enhanced ferroelectric and ferromagnetic properties of BiFeO 3 ‐PbTiO 3 multiferroic solid solutions with Ba substitutions
Author(s) -
Peng Rui,
Jian Jie,
Xu Zhoushang,
Chen Yixuan,
Chen Jianguo,
Cheng Jinrong
Publication year - 2020
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/jace.17331
Subject(s) - tetragonal crystal system , multiferroics , materials science , ferroelectricity , ceramic , remanence , perovskite (structure) , solid solution , trigonal crystal system , magnetization , phase (matter) , ferromagnetism , analytical chemistry (journal) , crystallography , crystal structure , mineralogy , dielectric , condensed matter physics , chemistry , composite material , metallurgy , magnetic field , physics , optoelectronics , organic chemistry , quantum mechanics , chromatography
Dense 0.6(Bi 0.9 La 0.1 )(Ga 0.05 Fe 0.95 )O 3 ‐0.4(Pb 1‐x Ba x )TiO 3 (BLGF‐PBT, x = 0, 0.1, 0.2, 0.3, and 0.4) ceramics with different Ba contents were prepared by the solid‐state reaction method, and effects of Ba contents on the structure and multiferroic properties were investigated. X‐ray diffraction results indicate that the Ba‐modified BLGF‐PBT ceramics exhibit single perovskite structure without detectable secondary phases, and a transition from tetragonal phase to rhombohedral one takes place with the increase of Ba content. The piezoelectric constant d 33 , remanent polarization P r , and remanent magnetization M r are improved by the Ba substitution simultaneously. Values of P r , M r , and d 33 of BLGF‐PBT ceramics for the composition of x = 0.3 with the coexistence of tetragonal and rhombohedral phases are 20 μC/cm 2 , 0.05 emu/g, and 256 pC/N, respectively, much higher than those without Ba modification. The significantly improved d 33 and M r indicate that BLGF‐PBT ceramics with Ba modification provide alternative materials for multifunctional devices.