Enhanced ferroelectricity, piezoelectricity, and ferromagnetism in Nd-modified BiFeO3-BaTiO3lead-free ceramics

Qiaoji Zheng, Lingling Luo, Kwok Ho Lam, Na Jiang, Yongquan Guo, Dunmin Lin

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Abstract

� 2014 AIP Publishing LLC. Lead-free multiferroic ceramics of 0.75Bi1-xNdxFeO3-0.25BaTiO3+1mol. % MnO2were prepared by a conventional ceramic technique and their structure, piezoelectricity, and multiferroicity were studied. The ceramics sintered at 890-990�C possess a pure perovskite structure. A morphotropic phase boundary of rhombohedral and monoclinic phases is formed at x=0.05. A small amount of Nd improves the ferroelectric and piezoelectric properties of the ceramics. The ferroelectric-paraelectric phase transition becomes gradually diffusive with x increasing. After the addition of Nd, the ferromagnetism of the ceramics is greatly enhanced by ∼320%. The increase in sintering temperature improves significantly the ferroelectric, piezoelectric, and ferromagnetic properties of the ceramics. The ceramics with x=0.05 sintered at 950-990�C possess improved ferroelectricity, piezoelectricity, magnetism and insulation with Prof 16.5-17.5 μC/cm2, d33of 113-121 pC/N, Mrof 0.127-0.138emu/g, R of ∼5�109Ω�cm and high TCof 473-482�C, indicating that the ceramic is a promising candidate for room-temperature multiferroic and high-temperature piezoelectric materials.
Original languageEnglish
Article number184101
JournalJournal of Applied Physics
Volume116
Issue number18
DOIs
Publication statusPublished - 1 Jan 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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