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Phase transition, piezoelectric, and multiferroic properties of La(Co 0.5 Mn 0.5 )O 3 ‐modified BiFeO 3 –BaTiO 3 lead‐free ceramics
Author(s) -
Luo Lingling,
Jiang Na,
Zou Xiao,
Shi Dongliang,
Sun Ting,
Zheng Qiaoji,
Xu Chenggang,
Lam Kwok Ho,
Lin Dunmin
Publication year - 2015
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201532127
Subject(s) - multiferroics , materials science , phase boundary , ferroelectricity , orthorhombic crystal system , curie temperature , dielectric , phase transition , ceramic , condensed matter physics , piezoelectricity , crystal structure , phase (matter) , crystallography , ferromagnetism , metallurgy , chemistry , composite material , physics , optoelectronics , organic chemistry
(0.75– x )BiFeO 3 −0.25BaTiO 3 − x La(Co 0.5 Mn 0.5 )O 3 + 1 mol% MnO 2 lead‐free ceramics ( x = 0–0.10) were synthesized by a conventional solid‐state reaction route and the effects of La(Co 0.5 Mn 0.5 )O 3 on phase transition, piezoelectric, ferroelectric, and multiferroic properties of the ceramics were investigated. The ceramics can be well sintered at 960 °C for 2 h. After the addition of La(Co 0.5 Mn 0.5 )O 3 , the crystal structure of the ceramics is transformed from rhombohedral (space group R3c) to orthorhombic symmetry (space group Amm2), and the morphotropic phase boundary (MPB) of rhombohedral and orthorhombic phases is formed at x = 0.01–0.03. The dielectric peak of the ceramics was found to become diffusive with increasing x . The ceramics with x = 0–0.03 possess strong piezoelectricity with d 33 of 95–108 pC N −1 , strong ferroelectricity with P r of 2.2–18.1 μC cm −2 , considerable magnetoelectric coefficient of 372–672 mV/cmOe, and high Curie temperature of 523–659 °C, showing potential applications in multiferroic devices.