Polycrystalline films of NiZn ferrite have been produced for the first
time by pulsed laser deposition from targets with nominal composition
Ni0.35Zn0.65Fe2O4 onto fused quartz substrates at temperatures of 800
degrees C-850 degrees C. Scanning electron microscopy and energy-disp
ersive X-ray analysis indicate that the films maintain stoichiometry.
This is consistent with the film structure, as determined from the X-r
ay diffraction patterns, which exhibit the single phase pattern of the
bulk material. The grain size of the crystallites is 0.3 to 0.6 mu m.
VSM measurements show coercive fields of 25.5kA/m (800e) which are la
rger than those found for the targets, in direct relation to the shape
anisotropy originating in the film microstructure. Saturation magneti
zation values of 660x10(5)J/T/m(3) (660 emu/cm(3)) are comparable with
the bulk material.