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用真空双源蒸镀法在NaC1单晶衬底上制备了金属Fe-Dy(镝)多层膜,用透射电镜(TEM)分析结构。结果表明,当Fe单层厚度≥2.4nm时,Fe为bcc结构,无明显择尤取向特征;Dy单层厚度<2.4nm时,Dy为非晶态。在透射电镜样品台上经100kv加速的高强度电子束流加热多层膜,非晶Dy首先晶化变为hcp结构,随加热时间的延长,晶粒长大。150s时Fe晶粒尺寸约300nrn,此时出现了铁镝氧化物。
A metal Fe-Dy multilayer film was prepared on a NaC1 single crystal substrate by vacuum double-source evaporation. The structure was analyzed by transmission electron microscopy (TEM). The results show that when the thickness of Fe monolayer is ≥2.4nm, Fe is bcc structure, and the orientation characteristics are not obvious. When Dy monolayer is less than 2.4nm, Dy is amorphous. In the transmission electron microscope sample stage by 100kv accelerated high-intensity electron beam heating multilayer, amorphous Dy first crystallization into hcp structure, with the heating time, grain growth. 150s when the Fe grain size of about 300nrn, iron dysprosium oxide appeared at this time.