Multiferroic properties of single-phase Bi0.85La0.15FeO3lead-free ceramics

G. L. Yuan, K. Z. Baba-Kishi, J. M. Liu, Siu Wing Or, Y. P. Wang, Z. G. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

84 Citations (Scopus)

Abstract

Single-phase and lead-free Bi0.85La0.15FeO3multiferroic ceramics were prepared by a rapid liquid sintering method to study their crystal structure and multiferroic behaviors. Rietveld refinement of X-ray diffraction data showed a pseudo-cubic structure plus a small triclinic distortion. The absence of Fe2+ions suggested few oxygen vacancies. Large polarizations of 20.3 μC/cm2together with a piezoelectric d33coefficient of ∼27.7 pC/N were achieved. This ferroelectricity originates from the stereochemical activity of the A-site Bi3+lone electron pair. The remnant magnetizations of 0.0744-0.227 emu/g of Bi0.85La0.15-FeO3permitted by the canting angle of canted antiferromagnetic order was released as a result of the collapse of the space-modulated spin structure of BiFeO3. The observed dielectric anomalies proved the magnetoelectric couplings between ferroelectric order and canted antiferromagnetic order.
Original languageEnglish
Pages (from-to)3136-3139
Number of pages4
JournalJournal of the American Ceramic Society
Volume89
Issue number10
DOIs
Publication statusPublished - 1 Oct 2006

ASJC Scopus subject areas

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

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