Acoustical and optical spin modes of multilayers with ferromagnetic and antiferromagnetic coupling
- 1 December 2000
- journal article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 62 (22), 14950-14955
- https://doi.org/10.1103/physrevb.62.14950
Abstract
A study of the in-phase (“acoustical”) and of the out-of-phase (“optical”) spin modes in layered ferromagnetic structures with both ferromagnetic and antiferromagnetic coupling is presented, in particular for the system Fe(20 Å)/Cr(20 Å)/Fe(20 Å)/Cr(9 Å)/Fe(100 Å). A calculation of the dynamic magnetization, assumed constant in each film, gives an explanation of the behavior of the two kinds of modes at different magnetic fields. The “acoustical” mode is the lowest frequency one for low applied fields, but its frequency switches with that of the “optical” modes at higher fields. It is found that the system exhibits soft modes as a function of the applied field. One of these is a Goldstone mode. DOI: http://dx.doi.org/10.1103/PhysRevB.62.14950 © 2000 The American Physical SocietyKeywords
This publication has 16 references indexed in Scilit:
- Studies of coupled metallic magnetic thin-film trilayersJournal of Applied Physics, 1998
- Brillouin light scattering study of Fe/Cr/Fe (211) and (100) trilayersPhysical Review B, 1996
- Magnetic properties of finite antiferromagnetic superlattices: Statics, dynamics, and the surface spin-flop phasePhysical Review B, 1994
- Brillouin light-scattering experiments on exchange-coupled ultrathin bilayers of iron separated by epitaxial copper (001)Physical Review B, 1990
- Calculation of Brillouin light scattering intensities from pairs of exchange-coupled thin filmsJournal of Applied Physics, 1988
- Layered Magnetic Structures: Evidence for Antiferromagnetic Coupling of Fe Layers across Cr InterlayersPhysical Review Letters, 1986
- Observation of a Magnetic Antiphase Domain Structure with Long-Range Order in a Synthetic Gd-Y SuperlatticePhysical Review Letters, 1986
- Some ways to modify the spin-wave mode spectra of magnetic multilayers (invited)Journal of Applied Physics, 1985
- Magnetostatic spin-wave modes of a heterogeneous ferromagnetic double layerJournal of Applied Physics, 1981
- Magnetostatic spinwave modes of a ferromagnetic double layerJournal of Applied Physics, 1980