The complex impedance of the bis(2-amino-6-methylpyridine)tetrachloridozincate compound(C_(6)H_(9)N_(2))_(2)ZnCl_(4) has been investigated in the temperature range 313-403K and in the frequency range 200 Hz-5MHz.The i...The complex impedance of the bis(2-amino-6-methylpyridine)tetrachloridozincate compound(C_(6)H_(9)N_(2))_(2)ZnCl_(4) has been investigated in the temperature range 313-403K and in the frequency range 200 Hz-5MHz.The impedance plots show semicircle arcs at different temperatures and an electrical equivalent circuit has been proposed to explain the impedance results.The circuits consist of the parallel combination of bulk resistance R_(p) and constant phase elements(CPE).The bulk resistance of the material decreases with rise in temperature.dc conduction activation energies are estimated from Arrhenius plots.The frequency-dependent conductivity data arefitted in the modified power law:σ_(ac)(ω)=σ_(dc)+A_(1)ω^(s1)+A_(2)ω^(s2).Dielectric data were analyzed using complex electrical modulus M^(*) at various temperatures.The modulus plot can be characterized by full width at half height or by β values of Kohlrausch-William-Watts(KWW)function.Activation energy of hopping is almost close to the activation energy of conduction suggesting a hopping transport mechanism.展开更多
The electrical and dielectric properties of the compound C_(7)H_(12)N_(2)[H_(2)PO_(4)]_(2)·1/2H_(2)O were investigated by the complex impedance spectroscopy,over a wide range of frequencies and temperatures,600 H...The electrical and dielectric properties of the compound C_(7)H_(12)N_(2)[H_(2)PO_(4)]_(2)·1/2H_(2)O were investigated by the complex impedance spectroscopy,over a wide range of frequencies and temperatures,600 Hz-5MHz and 303-408 K,respectively.Besides,a detailed analysis of the impedance spectrum suggested that the electrical properties of the material at several temperatures and the electrical equivalent circuit have been proposed to explain the impedance results.Concerning the Nyquist plots,they clearly showed the presence of bulk and grain boundary.As for the imaginary part of modulus at several temperatures,it shows double relaxation peaks,thus suggesting the presence of grains and grain boundary conductions in the sample.展开更多
文摘The complex impedance of the bis(2-amino-6-methylpyridine)tetrachloridozincate compound(C_(6)H_(9)N_(2))_(2)ZnCl_(4) has been investigated in the temperature range 313-403K and in the frequency range 200 Hz-5MHz.The impedance plots show semicircle arcs at different temperatures and an electrical equivalent circuit has been proposed to explain the impedance results.The circuits consist of the parallel combination of bulk resistance R_(p) and constant phase elements(CPE).The bulk resistance of the material decreases with rise in temperature.dc conduction activation energies are estimated from Arrhenius plots.The frequency-dependent conductivity data arefitted in the modified power law:σ_(ac)(ω)=σ_(dc)+A_(1)ω^(s1)+A_(2)ω^(s2).Dielectric data were analyzed using complex electrical modulus M^(*) at various temperatures.The modulus plot can be characterized by full width at half height or by β values of Kohlrausch-William-Watts(KWW)function.Activation energy of hopping is almost close to the activation energy of conduction suggesting a hopping transport mechanism.
文摘The electrical and dielectric properties of the compound C_(7)H_(12)N_(2)[H_(2)PO_(4)]_(2)·1/2H_(2)O were investigated by the complex impedance spectroscopy,over a wide range of frequencies and temperatures,600 Hz-5MHz and 303-408 K,respectively.Besides,a detailed analysis of the impedance spectrum suggested that the electrical properties of the material at several temperatures and the electrical equivalent circuit have been proposed to explain the impedance results.Concerning the Nyquist plots,they clearly showed the presence of bulk and grain boundary.As for the imaginary part of modulus at several temperatures,it shows double relaxation peaks,thus suggesting the presence of grains and grain boundary conductions in the sample.
