Dielectric and AC-conductivity studies of Dy2O3 doped (K0.5Na0.5)NbO3 ceramics

Dielectric Relaxation Spectroscopy and AC Conductivity of Doped Poly (Vinyl Alcohol)

The dielectric properties and AC conductivity of pure and doped PVA samples with different concentrations of CuCl2 and Thiourea are investigated in the frequency range from 0.2 Hz to 100 kHz within a temperature range from room temperature to 433 K. It is observed that the dielectric constant decreases with an increase of frequency for all samples. The behaviour of the dielectric loss (ε'') as ...

Dielectric nonlinearity of relaxor ferroelectric ceramics at low ac drives

Dielectric nonlinear response of (PbMg1/3Nb2/3O3)0.9(PbTiO3)0.1 (0.9PMN0.1PT) relaxor ceramics was investigated under different ac drive voltages. It was observed that: (i) the dielectric permittivity is independent on ac field amplitude at high temperatures; (ii) with increasing ac drive, the permittivity maximum increases, and the temperature of the maximum shifts to lower temperature; (iii) ...

DIELECTRIC, AC CONDUCTIVITY AND NON-LINEAR OPTICAL STUDIES OF ZnO /CaO COMPOSITE NANOFIBERS

Universal dielectric response of variously doped CeO2 ionically conducting ceramics

The Jonscher power law, or ‘‘universal dielectric response’’ ~UDR! behavior was studied for a range of CeO2 solid solutions with Y 31 and Gd dopants, with particular emphasis on dilute systems which possess relatively simple defect structures. The results show power-law frequency dependence of the ac conductivity, with exponent s50.6160.03, independent of temperature and concentration. The cond...

Calibration of ac and dc magnetometers with a Dy2O3 standard.

The ac susceptibility and magnetization curves of a glued Dy(2)O(3) powder sample are measured by an ac susceptometer and a dc superconducting quantum interference device magnetometer, both of which have been calibrated previously. It is shown that the magnetic moment of the paramagnetic sample as a function of field and temperature may be accurately expressed by a combination of the Curie-Weis...