4 research outputs found
Effect of Annealing on the AC Conductivity and the Dielectric Properties of InTe Thin Films
InTe thin films were prepared by thermal evaporation technique. The composition of the films is checked by energy dispersive X-ray analysis. X-ray analysis showed that the as-deposited InTe films as well as films annealed at temperatures ≤473K have crystalline structure. The ac conductivity σ(ω), the dielectric constant ε and the dielectric loss ε of InTe films were studied in the temperature range 303-373K and in the frequency range 100Hz-100kHz. The ac conduction activation energy ΔE(ω) was found to be 0.065eV for the as-deposited films. The ac conductivity was found to obey the relation σ(ω)=Aω, where s is the frequency exponent. The obtained temperature dependence of s is reasonably interpreted by quantum mechanical tunneling model. Both the dielectric constant ε and the dielectric loss ε increased with temperature and decreased with frequency in the investigated range. The frequency and temperature dependencies of σ(ω), ε, and ε for the annealed samples have the same behavior as that for the as-deposited samples. However, values of σ(ω), ε, and ε measured at any frequency and temperature increased with annealing temperature up to 473K. It was found also that ΔE(ω) decreased with annealing temperature