机构地区: 北京科技大学
出 处: 《金属学报》 1996年第1期85-90,共6页
摘 要: 用磁控溅射技术制备了系列Fe/Ti纳米多层膜,周期调制在22—240nm:用透射电镜和小角、高角X射线衍射分别研究了样品的结构;用振动样品磁强计和Mossbauer谱研究了样品的磁性.发现铁层厚度在2nm附近时存在铁磁性面心立方γ-Fe,样品的易磁化方向平行于膜面;随调制周期增大,样品的饱和磁化强度增加,矫顽力下降且与结晶状态有关. A series of Fe/Ti periodical nano-miltilayers was prepared by DC-magnetron sputtering. The modulation period is between 2.2 and 24 nm. The structure of the specimens was examined by TEM and small-or high-angle X-ray diffraction technique. Their magnetism was also studied by the vibratory sample magnetometer and Mossbauer spectrum. The face-centred cubic Fe was found in multilayers containing thinner Fe layers nearby 2 nm. The saturation magnetization increases and the coercivity decreases with increasing modulation period.