Possibility of Estimation of Multilayer Relaxation at a NiAl(111) Surface Using Computer Simulations of 180°NICISS
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概要
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The possibility of estimation of the multilayer relaxation with Ni atoms at the topmost layer of a NiAl(111) surface has been examined by using the computer simulations of the 180° neutral impact-collision ion scattering spectroscopy (NICISS). The computer simulations employing the ACOCT program code based on the binary collision approximation (BCA) are performed for the case of 2 keV Li^+ ions incident along the [121] direction of NiAl(111) surface. In the ACOCT results of 180° Li NICISS intensity versus angle of incidence between an ion beam and the target surface, it is found that the peak positions of peaks from not only Ni atoms but also Al atoms are strongly dependent on the relaxation values of first and second interlayer spacings. From these ACOCT results, it is possible to estimate the multilayer relaxation on Ni terminated layer at the NiAl(111) surface with the 180° Li NICISS data.
- 岡山理科大学の論文