The Nd-doping effect on dielectric abnormity of BiFeO3 ceramics below the Néel temperature
Bismuth neodymium ferrite (Bi1-xNdxFeO3: BNFO; x=0, 0.025, 0.075, 0.125, 0.175) ceramics were prepared by a co-precipitation method and sintered at 800℃, using nitrates as precursors. The crystal structure and dielectric properties of the samples were characterized by X-ray diffraction （XRD）and dielectric permittivity measurement at different temperatures and frequencies. XRD suggests that the impurity phases are weakened by suitably doping x=0.075. Dielectric spectra indicate that relaxation peaks below the Néel temperature which may be produced by the effect of grain boundaries and dipoles with heating vanish after doping Nd at the same content. Complex impedance spectra manifest that the doped samples are closer to Debye-type, and the impedance rises which will lead to low leakage current.
BiFeO3 Rare element doping Dielectric abnormity Complex impedance spectra
D.G. Chen X.G. Tang Q.X. Liu X.F. Cheng Y. Zou
School of Physics & Optoelectric Engineering, Guangdong University of Technology, GuangzhouHigher Ed School of Physics & Optoelectric Engineering, Guangdong University of Technology, Guangzhou Higher E
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
439-446
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）