title: Magnetization and ferromagnetic resonance in a Fe/Gd multilayer: experiment and modelling.
abstract: Static and dynamic magnetic properties of a [Fe(35 Å)/Gd(50 Å)]12superlattice are investigated experimentally in the temperature range 5-295 K using SQUID magnetometery and the ferromagnetic resonance (FMR) technique at frequencies 7-38 GHz. The obtained magnetization curves and FMR spectra are analysed theoretically using numerical simulation on the basis of the effective field model. At every given temperature, both static and resonance experimental data can be approximated well within the proposed model. However, a considerable temperature dependence of the effective field parameter in gadolinium layers has to be taken into account to achieve reasonable agreement with the experimental data in the entire temperature range studied. To describe the peculiarities of experimental FMR spectra, a non-local diffusion-type absorption term in Landau-Lifshitz equations is considered in addition to the Gilbert damping term. Possible reasons for the observed effects are discussed.
authors.affiliation: P. L. Kapitza Institute for Physical Problems RAS, Kosygina St. 2, 119334 Moscow, Russia.
authors.forename: A B
authors.initials: AB
authors.lastname: Drovosekov
authors.forename: N M
authors.initials: NM
authors.lastname: Kreines
authors.forename: A O
authors.initials: AO
authors.lastname: Savitsky
authors.forename: E A
authors.initials: EA
authors.lastname: Kravtsov
authors.forename: M V
authors.initials: MV
authors.lastname: Ryabukhina
authors.forename: V V
authors.initials: VV
authors.lastname: Proglyado
authors.forename: V V
authors.initials: VV
authors.lastname: Ustinov