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Ferroelectric and Ferromagnetic Properties of Hot‐Pressed Bi 0.95− x La 0.05 Tb x FeO 3 Ceramics
Author(s) -
Jiang Qinghui,
Lin Yuanhua,
Nan CeWen,
Shen Zhijian
Publication year - 2007
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/j.1551-2916.2007.01573.x
Subject(s) - materials science , ferroelectricity , dielectric , ceramic , hot pressing , multiferroics , sintering , coercivity , doping , ferromagnetism , ferroelectric ceramics , analytical chemistry (journal) , solid solution , phase (matter) , dielectric loss , condensed matter physics , metallurgy , chemistry , optoelectronics , physics , organic chemistry , chromatography
Multiferroic Bi 0.95− x La 0.05 Tb x FeO 3 (BLTFO) ceramics were prepared by hot‐pressing. It was found that their dielectric properties were very sensitive to sintering temperature. The samples hot‐pressed at 740°C show stable dielectric constant and rather low loss (∼1%) in the frequency range up to 1 MHz. When the nominal content of Tb is <0.08, the atomic arrangement keeps the R 3 c symmetry, while a phase transition appears at x ≈0.08–0.10. The introduction of Tb enhances the coercive field of the BLTFO ceramics and then restrains the ferroelectricity gradually. The doping of Tb at x ≤0.10 increases the ferromagnetization.