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Title: Dielectric relaxations and dielectric response in multiferroic BiFeO3 ceramics
Authors: Sitchai Hunpratub
Prasit Thongbai
Teerapon Yamwong
Rattikorn Yimnirun
Santi Maensiri
Keywords: Physics and Astronomy
Issue Date: 23-Feb-2009
Abstract: Single-phase multiferroic BiFeO3 ceramics were fabricated using pure precipitation-prepared BiFeO3 powder. Dielectric response of BiFeO3 ceramics was investigated over a wide range of temperature and frequency. Our results reveal that the BiFeO3 ceramic sintered at 700 °C exhibited high dielectric permittivity, and three dielectric relaxations were observed. A Debye-type dielectric relaxation at low temperatures (-50 to 20 °C) is attributed to the carrier hopping process between Fe2+and Fe3+. The other two dielectric relaxations at the temperature ranges 30-130 °C and 140-200 °C could be due to the grain boundary effect and the defect ordering and/or the conductivity, respectively. © 2009 American Institute of Physics.
ISSN: 00036951
Appears in Collections:CMUL: Journal Articles

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