Synthesis Of Ni-Zn Ferrite Films By Spin-spray Plating Method

Ni–Zn ferrite films were synthesized by spin-spray plating method. Ni–Zn ferrite films with thickness of 1–2μm were prepared by spin-spray plating method at 90℃on glass substrates from the deoxidizing solution of FeCl₂+NiCl₂+ZnCl₂ and the oxidizing solution of CH₃COONH₄+NH₃H₂O+NaNO₂. The composition of samples was identified by means of X-ray diffractometer (XRD).The morphology of samples was examined by scan electron microscope (SEM).Magnetic properties were measured by vibrating sample magnetometer (VSM) and vector meshwork analyzer.Based on experimental study, the effect of conditions which include the pH value of oxidizing solution, the content of Zn and the addition of Co on the properties of films was investigated.When the pH value of oxidizing solution increases from 8.0 to 8.8, both the deposition rate and surface roughness of the films increase.XRD pattern shows that the diffraction peaks of the deposited film are corresponding with characteristic peaks of the spinel ferrite. When the pH value of oxidizing solution is 8.0,the film has higher saturation magnetization, lower coercivity and larger complex permeability.This film exhibits a large saturation magnetization of 229kA/m and low coercivity of 0.693kA/m.When the content of Zn increases from 0 to 0.6,the saturation magnetization(Ms) of films roses firstly and the declines. When the content of Zn is 0.3, the film exhibits a large saturation magnetization of 147.8 kA/m and low coercivity of 2.489kA/m.When the content of Co increases from 0 to 0.09, the complex permeability value of films roses firstly and the declines.When the content of Co is 0.03, the film is even and compact. The real part of complex permeabilityμ′at about 1.7GHz of the frequency is at the maximum of 72.5. The imaginary part of complex permeabilityμ″at about 2 GHz of the frequency is at the maximum of 107.5.