Spinel NiZnCo ferrite granular films 1.5 mu m in thickness were prepared on glass substrates by the spray plating method at 90 degrees C with a bias magnetic field of 300 Oe. The soft magnetic film exhibited large saturation magnetization of 270 kA/m and high resistivity of 127 Omega cm. The coercivity and in-plane anisotropy field took small values of 8.7 and 20 Oe. The exact magnetization precessional equation under the weak alternating field was applied to construct a calculation model of the effective permeability excited by an incident field parallel to the film plane. Comparisons of calculated results with experimental ones were in agreement on magnitude. The disagreement between theory and experiment was attributed to a large damping coefficient of the ferrite film. A static permeability mu' of around 89 and very high resonance frequency of 2.1 GHz were achieved. The value of magnetic loss mu' was above 15 even in a wide frequency range between 1 and 3.5 GHz.