Hyperfine fields and electronic structures in Fe Co and Fe Ni multilayer systems

Using KKR band structure calculation method, hyperfine field distributions and electronic structures in Fe₃ Co₃ and Fe₃ Ni₃ multilayer systems are investigated where all the atoms are sited on bcc lattice points. The calculated hyperfine fields at the Fe sites in the interior monolayers are enhanced and those at the Fe site in the interfacial monolayers are reduced. It is found that the reduction of transferred hyperfine field (valence electron contribution to the hyperfine fields) results in the reduced hyperfine field at the Fe site in the interfacial monolayers. Core electron contributions are almost proportional to the local spin moment (α = -99kG/μB) and valence ones are roughly proportional to the total moment within the first two shells of neighbors.