论文标题
Si（100）上Fe-Ni/Cu/Fe-Ni Trilayers的结构特性
Structural properties of Fe-Ni/Cu/Fe-Ni trilayers on Si (100)
论文作者
论文摘要
我们研究了fe $ _ {1-x} $ ni $ _x $ _x $/cu/cu/fe $ _ {1-x} $ ni $ _x $（$ x = 0.5 $，non var和$ x = 0.36 $，invar）在si〜（100）〜（100）pactie dc purity facue Intri facue Interi and Interi facue Interi and Interi facue Intrum facue Intrum and Interi fac，每种合金组合物的Cu金属厚度为4、6和8 nm。使用X射线衍射研究了三角形的合金膜的结构，并通过X射线反射率测量获得了层的厚度\＆粗糙度。 AS制备和退火的三层均表现出分层结构。非invar三层中的AS沉积Fe-Ni合金仅表现出FCC结构，而在Invar合金中，它表现出混合的FCC和BCC相。有趣的是，在超高真空中以425 $^0 $ c退火后，invar合金完全转化为所有CU厚度的FCC结构。在Infar和非Invar Trilayers中，与Fe-Ni合金层相对应的Bragg反射在退火后变得清晰。使用高温下Fe和Ni原子的扩散来解释Invar Trilayer中诱导的结构转化。
We investigate the structural properties of Fe$_{1-x}$Ni$_x$/Cu/Fe$_{1-x}$Ni$_x$ ( $x=0.5$, non Invar and $x=0.36$, Invar) trilayers deposited on Si~(100)~at room temperature using dc magnetron sputtering technique in ultra high vacuum conditions taking high purity Fe, Ni and Cu metals with Cu layer thickness 4, 6 and 8 nm for each alloy composition. The structure of the alloy films of the trilayers was investigated using x-ray diffraction and the thickness \& roughness of the layers were obtained by x-ray reflectivity measurement. Both the as prepared and annealed trilayers exhibit layered structure. The as deposited Fe-Ni alloy in non Invar trilayer exhibits only fcc structure whereas in Invar alloy it exhibits a mixed fcc and bcc phases. Interestingly after annealing at 425$^0$C in ultra high vacuum, the Invar alloy completely transformed to fcc structure for all Cu thicknesses. In both Invar and non Invar trilayers, the Bragg reflections corresponding to Fe-Ni alloy layers become sharp after annealing. The induced structural transformation in Invar trilayer is explained using enhanced diffusion of Fe and Ni atoms at high temperatures.
