Effect of Laser Irradiation on the Structural and Electrical Properties of Co-Zn Ferrite Thin Film

Abstract

Thin films of irradiated and non-irradiated Co-Zn ferrite was prepared by the thermal evaporation method on a glass substrate. The samples were annealed at 200°C, 400°C and 600°C for 1hr. The XRD analysis of all kinds of films, prepared for this study, shows that the spinel phase is almost completed after annealing. The change of the XRD after annealing is explained by the change of the relative quantities of the various magnetic phases (spinel and oxides) present before and after the annealing process. After annealing at 600°C, the material shows a spinel phase with lattice constant 8.30 A° for normal samples and 8.38 A° for the irradiated ones, respectively. After laser irradiation, the XRD pattern indicates the formation of a distorted spinel structure besides the spinel phase. A metallic behavior with temperature was observed in the two samples, irradiated and non-irradiated. The resistance of the sample was found to decrease by annealing process which may be due to the decrease in the number of grain boundaries.

Laser induced adjustment of the conductivity of rare earth doped Mn-Zn nanoferrite

“…A small amount of R 3+ ions integrated in the ferrite favor the development of the crystalline secondary phases connected with alterations in the electrical and magnetic parameters. Several researchers [12][13][14][15][16] examined the influence of laser irradiation and doping on the properties of bulk and thin films of ferrites. Rare earth doping effect [17,18] on the Mg-Ti ferrite electrical properties was also examined and it was reported that the type and concentration of the 4f element take the most important part in controlling the conductivity as well as the dielectric parameters.…”

THE ELECTRICAL PROPERTIES OF Mg-Cu-Zn FERRITES IRRADIATED BY γ-RAYS OF ⁶⁰Co SOURCE

“…Gamma ray can generate defects of various types such as point, cluster, beside excitation and ionization of the atoms. The effect of γ irradiation on microstructure, diffusion coefficient of oxygen ions, dielectric properties, thermoelectric power and thermal conductivity of CoZn ferrites was investigated (Ateia, 2006;Tashtoush, Science Publications AJAS 2005; Hemeda and El-Saadawy, 2003). Okasha (2010) found that, the γ-irradiation improved the magnetic properties of Mg-Mnand Mn-Ni ferrites nano-particles (Okasha, 2010;Hassan et al, 2013).…”