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Zinc ferrite films were deposited on fused quartz substrate at different substrate temperatures using a pulsed laser deposition technique. The deposited samples were ex situ annealed at different temperatures up to 650 °C in air for 2 h. It was found that the spontaneous magnetization of the films depends both on the grain size and on the substrate temperatures. The largest values of spontaneous magnetization for our sample were 3000 G at 300 K and 6600 G at 10 K, for the film deposited at substrate temperature of 450 °C. The ferromagnetic resonance linewidths of the films were found to depend both on substrate and annealing temperatures. A relatively low linewidth of 195 Oe was observed in parallel configuration for the film deposited at 250 °C and annealed at 350 °C. [ABSTRACT FROM AUTHOR]

CoFe2O4/ZnFe2O4 bilayers were deposited by the pulsed laser deposition on amorphous fused quartz substrate at substrate temperature of 350^\circC and in oxygen pressure of 0.16 mbar. The films were studied after ex-situ annealing for 2 h in air at various temperatures up to 650^\circC. The magnetic properties of the bilayers were studied at 300 K and at 10 K. Ferromagnetic resonance was carried out at x-band frequencies at room temperature. It was found that as a result of annealing, the diffusion between Co ferrite and Zn ferrite starts around 350^\circC and leads to a large line width system having magnetization, which remains undetected by Ferromagnetic resonance. [ABSTRACT FROM AUTHOR]