The magnetic hysteresis loop measured at room temperature of the products obtained is shown in Fig.4, with a large saturation magnetization(M=78.44 emu/g) slightly exceeding the property of NiZn ferrite powders we observed of 77.40 emu/g. the exhibited ferromagnetic hysteresis loop indicates the presence of ordered magnetic structure in the ceramics, and the 's' shaped curve with low coercivity(H=34.028 Oe) demonstrates a characteristic of superparamagnetism.