Dielectric and structural properties of iron doped titanate nano-composites

TiO2 has been used for gas sensing devices [1] photo catalytic devices [2] and photoelectric devices [3]. Recently the dielectric properties of TiO2 have been of great interest for applications in the telecommunications industry due to its unusual high dielectric constant and low dielectric loss. The use of layers of high dielectric constant materials in small scale metal insulator semiconductor devices has been considered in numerous recent publications these materials unable to maintain the same capacitance density as SiO
2
films but provide a smaller leakage current density. Examples of such materials include tantalum and yttrium oxides [4–6] and titanium dioxide which has the largest dielectric constant value varying in the range of 25 –100 [7].