Dielectric properties of a ceramic oxide: Li(Ni_(7/10)Fe_(3/10))VO_4

摘要

The Li(Ni_(7/10)Fe_(3/10))VO_4 compound has been synthesized by solution-based chemical route. Its dielectric response is investigated using complex impedance spec-troscopy technique. Frequency dependence of dielectric constant (ε_r) at different temperatures shows low-frequency dispersion due to polarized structure of the material and mobile charge carriers. Temperature dependence of ε_r at different frequencies exhibits the dielectric anomalies in ε_r at different temperatures. Dielectric relaxation process in the material is signified by the variation of tangent loss with frequency at different temperatures. The variation of relaxation time with temperature obeys the Vogel-Fulcher law.