Preparation And Properties Research Of Ba_0.8 Sr_0.2 Tio₃ /CoFe₂O₄ Multi-iron Thin Films

Multi-ferrous materials because of its ferroelectric and Ferromagnetic,and can generate megnetoelectric(me) effect,thus in the information storage, sensors, devices such as electron spin has a very broad application prospects.BST is a typical perovskite ferroelectric material,it have a high dielectric constant, low dielectric loss, low leakage current and other excellent properties. In recent years become a hot research.CFO is the spinel structure of magnetic materials, it have high magnetic anisotropy, large coercivity, high resistivity, spectral characteristics of the magnetic is good and other excellent properties.In this paper, BST,CFO target was prepared by solid state reaction. And the target preparation process was modified. We use Magnetron sputtering method to prepare single BST, CFO film, and to study their conditions. Analysis of film surface morphology, crystal structure, ferroelectric properties, ferromagnetic properties, composition by Atomic force microscope, RT66A standard ferroelectric tester, X-ray diffraction, vibrating sample magnetometer, field emission scanning electron microscopy, X-ray fluorescence diffraction, we get de best film preparation process, and use the best film preparation process prepare two kinds of layered thin films and mixed-shaped composite Multi-ferrous films. Similarly by using the several instruments analyze three composite films of all aspects. The results show that layered structure is superior to mixed film. If the ferroelectric layer and the ferromagnetic layer deposition in a different order, we get different performance. The film which it's ferroelectric layer deposited on the sample surface is better than another in field of it Ferroelectric properties. If the deposition in reverse order, we get Different performance results.