Conductivity of Cu+2 ion-conducting glassy nanocomposites

We have studied the ionic conductivity of CuI doped molybdate glass-nanocomposite systems. X-ray diffraction (XRD) and high-resolution transmission electron microscopic (HR-TEM) studies have been carried out to obtain the particle size and the distribution of coppermolybdate (CuMoO4) nanoparticles in glass matrix. We have investigated the electrical conductivity of these glass-nanocomposites in a wide frequency and temperature range. We have analyzed the ac conductivity data using a power law model. Dc conductivity and hopping frequency show thermally activated nature. The power law exponent is almost same for each composition. It has been observed that mobile ion concentration is slightly dependent upon composition, but independent of temperature. The scaling of the conductivity spectra shows temperature-independent electrical relaxation process.