【摘要】 采用超高真空电子束蒸镀方法制备了Fe/Ru多层膜,Ru层厚度固定为2 nm,Fe层厚度为0.6~5 nm,研究了Fe层厚度的变化对薄膜结构及其磁性能的影响。Fe层厚度小于5 nm时,受Ru层HCP结构的影响,Fe层生长为六方晶格的亚稳相。多层膜呈现明显的平面易磁化特性,并随Fe厚度降低而减弱。Fe的平均原子磁矩和Fe层厚度的倒数存在线性关系,与死层理论预言的结果相一致。实验结果证实,亚稳相六方晶格的Fe具有铁磁性,其平均原子磁矩计算值为1.9μB,略低于BCC Fe,Fe/Ru界面层的死层厚度为0.25 nm。更多还原

【Abstract】 Fe/Ru multilayers were prepared by ultra-high vacuum electron-gun evaporation with Ru film thickness of 2nm and Fe film thickness of 0.65nm.The structure and magnetic properties of Fe/Ru multilayers were investigated.A metastable HCP Fe phase is obtained when thickness of Fe film(t_Fe) is less than 5nm.Magnetic measurement indicats that the metastable HCP Fe phase exhibits ferromagnetic behavior and has a magnetic moment of（1.9）μ_B,which is a little less than BCC Fe.A linear relationship of the magnetic moment per atom versus 1/t_Fe is obtained which is in correspondence with "dead layer" theory very well.The interface thickness(d_int=0.25nm) is calculated which is less than reported before.It indicats that the preparation method affects the interface thickness.更多还原