Structural and electrical properties of Mg2TiO4

Shalendra KUMAR; Ravi KUMAR; B. H. KOO; H. CHOI; Dong Uk KIM; Chan Gyu LEE

doi:10.2109/jcersj2.117.689

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 (tanδ) was found to be small ∼ 0.01 through out the whole temperature range. The value of the exponent (s), evaluated using the power law σ_AC = ω^S, is found to be ∼1, which indicates the good correlation of the hoping of carriers in the system.

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