Eur. Phys. J. B 40, 137-144 (2004)
https://doi.org/10.1140/epjb/e2004-00252-4

Microscopic theory of dipole-exchange spin waves in magnetic multilayers

Departamento de Física, Universidade Federal do Ceará, Campus do Pici, caixa postal 6030, Fortaleza, Ceará, 60455-760, Brazil

Corresponding author: ^a pereira@fisica.ufc.br

Received: 17 March 2004
Revised: 26 May 2004
Published online: 12 August 2004

Abstract

A microscopic model is employed to calculate the spectrum of dipole-exchange spin waves in multilayers in which thin ferromagnetic films are separated by non-magnetic spacers. Two configurations are considered: in one the films have magnetizations parallel to each other, in the other the magnetizations are antiparallel. The calculations extend a previous microscopic formalism that allows the calculation of the dipole-exchange spin wave spectrum in thin films. The results show the splitting of the frequency bands and the mode mixing caused by the dipolar interaction between the films as a function of spacer thickness.