Calculation of spin waves in multilayered structures including interface anisotropies and exchange contributions.

Abstract

Spin-wave properties have been calculated for multilayered structures consisting of alternating ferromagnetic and nonmagnetic layers, as well as for all-ferromagnetic structures, fully taking into account magnetic interface anisotropies and exchange contributions. In the crossing regime of dipolar modes and exchange modes, the gap width is strongly influenced by the amount of interface anisotropy. In the case of all-magnetic multilayered structures, a new type of collective spin-wave excitation arising from coupled exchange modes is predicted.