Spin-wave instabilities, auto-oscillations, and chaos in yttrium-iron-garnet

A review is presented of recent experimental results in yttrium-iron-garnet subject to three different spin-wave pumping mechanisms: parallel pumping, subsidiary resonance (first-order Suhl process), and premature saturation of the main resonance (second-order Suhl process). A theoretical model deri...

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Bibliographic Details
Published inProceedings of the IEEE Vol. 78; no. 6; pp. 893 - 908
Main Authors Rezende, S.M., de Aguiar, F.M.
Format Journal Article
LanguageEnglish
Published United States IEEE 01.06.1990
Subjects
360104 - Metals & Alloys- Physical Properties
ALLOYS
Antiferromagnetic materials
Chaos
Couplings
Displays
Electromagnetic wave absorption
GARNETS
INSTABILITY
IRON ALLOYS
Magnetic confinement
Magnetic materials
Magnetic resonance
MATERIALS SCIENCE
MATHEMATICAL MODELS
MINERALS
Nonlinear equations
NONLINEAR PROBLEMS
OXYGEN COMPOUNDS
SILICATES
SILICON COMPOUNDS
SPIN WAVES
Yttrium
YTTRIUM ALLOYS
Online AccessGet full text
ISSN0018-9219
1558-2256
DOI10.1109/5.56906

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Summary:A review is presented of recent experimental results in yttrium-iron-garnet subject to three different spin-wave pumping mechanisms: parallel pumping, subsidiary resonance (first-order Suhl process), and premature saturation of the main resonance (second-order Suhl process). A theoretical model derived from first principles and leading to coupled nonlinear spin-wave equations, is used to interpret the observed spin-wave instabilities, auto-oscillations, and chaotic dynamics. It is shown that a two-mode model explains the main features of the experimental observations, both in parallel and perpendicular pumping. Improvements needed in the model are indicated.< >
ISSN:0018-9219
1558-2256
DOI:10.1109/5.56906