Dielectric and electrical studies of Li-Ti mixed nanoferritesAuthor(s): R.M.Sangshetti, V.A.Hiremath, V.M.Jali
The polycrystalline samples of the Li-Timixed nanoferrites, Li0.5+0.5xTixFe2.5- 1.5xO4, (0.02 = x = 0.1) were prepared by combustionmethod. The IR spectra in the range 400 800 cm-1were recorded at roomtemperature. Thermoelectric power measurement shows n-type conductivity. Dielectric constant and loss values increase with increase in temperature and decreases with increase in frequency. Two relaxations were observed in the temperature dependence of tan. The activation energy required for the relaxation was calculated from the conductivity data. These relaxations were attributed to the electron hopping between Fe2+ and Fe3+ ions on octahedral sites and the creation of oxygen defects.