Eur. Phys. J. B 61, 121-126 (2008)
https://doi.org/10.1140/epjb/e2008-00062-8

Magnetostatic modes in coupled antiferromagnet/ferromagnet bilayers

¹ Centro Federal de Educação Tecnológica de Pernambuco - Unidade Pesqueira, 55., 200-000 Pesqueira, PE, Brazil
² Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, 59078-970 Natal, RN, Brazil
³ Departamento de Física, Universidade Federal do Ceará, 60455-760 Fortaleza, Ce, Brazil
⁴ The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34014 Trieste, Italy

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

Received: 27 August 2007
Published online: 16 February 2008

Abstract

We study the influence of interface effects on the magnetostatic modes propagating in a coupled ferromagnetic/antiferromagnetic bilayer. We assume that the magnetic layers are thick enough to be described by the bulk parameters and they are coupled through the interaction between the magnetic moments located at the interface. We use a phenomenological approach taking into account the presence of different magnetic layers in the system to calculate the modified dynamical response of each material. We use the corrected magnetic permeability of the layers to obtain a correlation between the interface characteristics and the physical behavior of the magnetic excitations propagating in the system.