Brillouin Scattering from Surface Acoustic Waves in Ni/Al Multilayer Films

概要

論文の詳細を見る
The surface acoustic wave velocities in Ni/Al multilayer films were determined using Brillouin scattering for several modulation periods A ranging from 10.7Å to 84.9 Å. The Rayleigh wave velocity shows a minimum around Λ 〜 40 Å. In order to obtain more detailed information on the elastic properties of the multilayer system, the effective elastic constants, C_<11>, C_<33>, C_<44> and C_<13>, were determined for each multilayer. The C_<13> constant increases by about 50% below Λ 〜 40 Å and the C_<33> constant decreases slightly below Λ 〜 30 Å as Λ decreases. On the other hand, the C_<11> constant is independent of Λ. These elastic constants effect the Rayleigh wave velocity only slightly, while the minimum of the C_<11> elastic constant is a major cause of the minimum Rayleigh wave velocity.
社団法人応用物理学会の論文
1997-05-30