Ni/Pd人工格子膜内原子スケール構造の膜形成シミュレーションによる探索

概要

論文の詳細を見る
Recently, multilayer films play an important role for achieving a high density recording. To know nanostructure of the multilayers is important for further improvements of magnetic properties. In the present review, research of nanostructure at the interface is discussed by simulation method. Molecular dynamics simulations of the formation process of Ni/Pd bilayer films were performed by employing the embedded atom method with high (10 eV) and low (0.1 eV) kinetic energies of incident atoms for two different crystal orientations: fcc(111) and fcc(100) of Ni or Pd substrate. The tendencies of the film formation process and the interdiffusion at the interface were similar in both the (111) and (100) cases. However, the strain at the interface of films on the (100) substrate was larger than that on the (111) substrate. In the case of Pd deposited on Ni(100), the Pd film grew with the (111) symmetry and partially observed Ni(100)-c(16×2) structure. The crystal orientation of the Pd layer differed from the value of the strain in the Ni(100) underlayer. In the crystal orientation dependencies, the value of the strain in the magnetic layer at interfaces derived from simulations corresponds well with the experimental value of the perpendicular magnetic anisotropy.
社団法人日本磁気学会の論文
2001-06-01