Enhanced ferroelectric, magnetic and magnetoelectric properties of multiferroic BiFeO3–BaTiO3–LaFeO3 ceramics
作者： Min Zhang , Xiaoyan Zhang , Xiwei Qi , Hongen Zhu , Ying Li
DOI: 10.1016/J.CERAMINT.2018.08.175
关键词:
摘要: Abstract A lead–free multiferroic ceramic 0.7BiFeO3–0.3BaTiO3 showed strong ferroelectric and piezoelectric properties, but weak magnetic magnetoelectric properties. We herein expected that the electrical properties of ceramics could be enhanced by introducing LaFeO3. (0.7–x) BiFeO3–0.3BaTiO3–xLaFeO3 (x = 0–0.2) were synthesized solid-state reaction. All formed a perovskite structure, morphotropic phase boundary (MPB) between rhombohedral orthorhombic phases at x = 0.025. The with MPB composition had high unipolar strain (Smax = 0.14%), piezoelectricity (d33 223 pC/N, d33 * 350 pm/V), ferroelectricity (Pr 25.67 mC/cm2) magnetoelectricity (aME 466.6 mV/cm·Oe), which can attributed to addition La ions. improved angle also demonstrated augmentation on microscopic view. ferromagnetism was evidently after LaFeO3 doping, remanent magnetization Mr increased from 0.0207 0.0622 emu/g rising x 0 0.075. In conclusion, prepared may applicable as promising materials for novel electronic devices.
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