【摘要】 用化学共沉法制备了纳米Co0.7Fe2.3O4粉末,用射频磁控溅射镀膜法制备了纳米结构的Co0.7Fe2.3O4薄膜。采用X射线衍射仪及振动样品磁强计对不同热处理温度的样品进行了结构和磁性分析,结果显示,Co0.7Fe2.3O4薄膜的比饱和磁化强度略低于粉体材料,矫顽力高于粉体材料,并且晶粒明显细化。650℃退火薄膜具有最大矫顽力125.2kA·m-1。550℃退火薄膜可同时获得较高的矫顽力和较高的比饱和磁化强度。Co0.7Fe2.3O4薄膜还具有平行膜面方向的择尤取向。更多还原

【Abstract】 The nanocrystalline Co0.7Fe2.3O4 powders were synthesized by chemical co-deposition method, and Co0.7Fe2.3O4 ferrite films with nanocrystalline structure were prepared by rf magnetron sputtering. The microstructure and magnetic properties were analyzed and measured by X-ray diffraction (XRD), vibrating sample magnetometer (VSM). The experimental results show that the specific saturation magnetization of Co0.7Fe2.3O4 ferrite films is a bit lower than that of particles, and the coercive force is higher than that of particles. Meanwhile, the grain refinement of Co0.7Fe2.3O4 films is obvious. The maximum coercivity of 125.2 kA/m is obtained for Co0.7Fe2.3O4 films annealed at 650℃ for 3h. High coercivity and specific saturation magnetization of Co0.7Fe2.3O4 films were obtained simultaneously for sample annealed at 550℃ for 3h. Co0.7Fe2.3O4 films exhibit the preferred orientation parallel to its plane.更多还原