Abstract
We have studied the structural and electrical properties of Mg2TiO4 inverse spinel using X-ray diffraction, Raman spectroscopy, ac conductivity and dielectric spectroscopy. Polycrystalline sample of Mg2TiO4 was prepared by the conventional solid state reaction technique. Powder X-ray diffraction analysis indicates single phase nature of inverse spinel Mg2TiO4. Raman study also infers; that Mg2TiO4 exhibits inverse spinel structure. The dielectric constant measured as a function of frequency exhibits a resonance peak at 9 MHz. The dielectric constant measured as function of temperature (100-300 K) at 500 kHz is found to increase with temperature. The value of the loss tangent (tan delta) was found to be small similar to 0.01 through out the whole temperature range. The value of the exponent (s), evaluated using the power law sigma(AC) = omega(S), is found to be similar to 1, which indicates the good correlation of the hoping of carriers in the system. (C) 2009 The Ceramic Society of Japan. All rights reserved.