Non-Gilbert-type damping of the magnetic relaxation in ultrathin ferromagnets: Importance of magnon-magnon scattering
- 25 August 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 68 (6), 060102
- https://doi.org/10.1103/physrevb.68.060102
Abstract
Ferromagnetic resonance (FMR) measured over a large range of frequencies from 1–70 GHz offers a unique possibility to study the dynamic response of ultrathin ferromagnetic films in the range from nanoseconds to picoseconds. The linewidth of the FMR signal is commonly believed to follow a linear dependence, the so-called Gilbert damping. Here we give experimental unambiguous evidence that other processes of spin dynamics such as two-magnon scattering are equally important at interfaces of ferromagnetic to nonmagnetic nanostructures. The relevance to spin transport and spin injection as well as the agreement with recent theoretical proposals are discussed.
Keywords
This publication has 26 references indexed in Scilit:
- Enhanced Gilbert Damping in Thin Ferromagnetic FilmsPhysical Review Letters, 2002
- Layered magnetic structures: history, facts and figuresJournal of Magnetism and Magnetic Materials, 2001
- Extrinsic contributions to the ferromagnetic resonance response of ultrathin filmsJournal of Applied Physics, 2000
- Extrinsic contributions to the ferromagnetic resonance response of ultrathin filmsPhysical Review B, 1999
- Emission of spin waves by a magnetic multilayer traversed by a currentPhysical Review B, 1996
- Current-driven excitation of magnetic multilayersJournal of Magnetism and Magnetic Materials, 1996
- Two-dimensional Ising transition of epitaxial Fe films grown on Ag(100)Physical Review B, 1994
- Surface spin-flop transition in Fe/Cr(211) superlattices: Experiment and theoryPhysical Review Letters, 1994
- Dimensional crossover in ultrathin Ni(111) films on W(110)Physical Review Letters, 1992
- Magnetic properties of Gd/Dy superlattices: Experiment and theoryPhysical Review Letters, 1990