作者: S. Sumi , P. Prabhakar Rao , M. Deepa , Peter Koshy
DOI: 10.1063/1.3481389
关键词: Ceramic 、 Dielectric spectroscopy 、 Condensed matter physics 、 Grain boundary 、 Temperature coefficient 、 Electrical resistivity and conductivity 、 Conductivity 、 Materials science 、 Thermal conduction 、 Atmospheric temperature range
摘要: Complex ceramic oxides, CeTiMO6 (M=Nb or Ta) having aeschynite type mineral structure were prepared by the conventional route. impedance analysis in frequency range 10 Hz–1 MHz over a wide temperature (30–600 °C) indicates presence of grain boundary effect along with bulk contribution and also confirms non-Debye multiple relaxations material. The dependent conductivity plots exhibit double power law dependence suggesting three types conduction mechanisms: low (10 kHz) owing to long translational motion electrons (frequency independent), mid-frequency (1–10 due short-range hopping, high kHz–1 MHz) localized orientation hopping mechanism. model can explain nature mechanism completely. electrical measurements suggest negative coefficient resistance behav...