DIELECTRIC RELAXATION IN NaNbO_3 SINGLE CRYSTAL

Konieczny
1999 Condensed Matter Physics  
Dielectric permittivity studies of reduced samples of NaNbO 3 single crystal in the range of temperatures 30-500 • C and frequency 20 Hz-1 MHz are reported. In this temperature range a relaxation process is observed in the frequency range of about 100 kHz. This is an additional process to the earlier reported one [7] . The obtained data were fitted to Cole-Cole formula. The dispersion step ∆ǫ (the maximum value of ∆ǫ =1000) is temperature dependent. The mean relaxation time τ does not obey the
more » ... does not obey the Arrhenius law above T C . The occurrence of this relaxation process may be connected with oxygen vacancies.
doi:10.5488/cmp.2.4.655 fatcat:6ps7bapxunadtdnhz6lcvucp4e