화학공학소재연구정보센터
Journal of the American Ceramic Society, Vol.90, No.5, 1444-1447, 2007
Ferroelectric and ferromagnetic properties of hot-pressed Bi0.95-xLa0.05TbxFeO3 ceramics
Multiferroic Bi0.95-xLa0.05TbxFeO3 (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 degrees C show stable dielectric constant and rather low loss (similar to 1%) in the frequency range up to 1 MHz. When the nominal content of Tb is < 0.08, the atomic arrangement keeps the R3c symmetry, while a phase transition appears at x approximate to 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.