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Erschienen in:
01.04.2011
Influence of Dy-doping on ferroelectric and dielectric properties in Bi1.05−xDyxFeO3 ceramics
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 4/2011
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Abstract
Bi1.05−xDyxFeO3 (BDFO) (x = 0−0.2) ceramics were synthesized by solid-state reaction method. The influence of Dy dopant on crystal structural, dielectric and ferroelectric properties was investigated. The lattice parameter and the Curie temperature of BDFO were degraded continuously with increasing contents of Dy3+ cations. Leakage current density, ferroelectric polarization and dielectric loss were improved by appropriate Dy doping. When x = 0.1, BDFO showed the best electric properties. At applied electric field of 53 kV/cm, the remnant polarization (2P
r
) was 12.2 μC/cm2.These improvements in electric properties in BDFO ceramics could have resulted from the relatively low oxygen vacancy concentration and structural distortion.