Effect of Molecular Field Periodicity on Energy of Free Electrons in Ferro-Paramagnetic Multilayers

概要

論文の詳細を見る
The diffraction of free electrons through the localised magnetic moments contributes to the magnetic coupling between ferromagnetics layers separated by metallic paramagnetic spacers. It is shown that the energy of free electrons is lower for the case of antiferromagnetic coupling. Calculations have been performed in second-order perturbation approximation. The perturbative potential is the Zeeman coupling between the electron spins, and the molecular field is described by different Fourier expansions according to the ferro- or antiferromagnetic configurations. It is concluded that, for perfectly planar interfaces, the coupling carried through free electrons is always antiferromagnetic. Presumably, more complicated mechanisms are responsible for the observed oscillations. The molecular field penetration into the paramagnetic spacer can account for the ferromagnetic coupling observed for very thin paramagnetic layers.
社団法人応用物理学会の論文
1993-12-15