Investigations of Spin-Wave Interactions by the Parallel Pumping Technique

Green, J. J.; Schlömann, Ernst

doi:10.1063/1.1728730

Cited by 17 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…17, exhibit saturation in qualitative agreement with Eq. (6.5a) [100]. Most of the experimental error appears to result from bistability phenomena encountered above the threshold.…”

Section: (65)mentioning

confidence: 94%

“…Most of the experimental error appears to result from bistability phenomena encountered above the threshold. 18 define critical frequencies at which new relaxation processes become possible [98,100]. 18, indicates a structure which can be related to various relaxation processes.…”

Section: (65)mentioning

confidence: 99%

“…For spin waves with ajk < \ ω Μ (^3 kMc in YIG) the splitting process can occur and then A H k increases with decreasing frequency [173,174]. In particular, the peak at 950 oe is attributed to the onset of the three-magnon confluence process and that at 1425 oe to the coalescence of two magnons to form a phonon [100]. 18) is also related to critical spin wave frequencies for different relaxation processes.…”

Section: Relaxation Data and Instability Controlmentioning

confidence: 99%

See 2 more Smart Citations

Ferromagnetic Resonance at High Power

Damon¹

1963

Magnetism

View full text Add to dashboard Cite

“…17, exhibit saturation in qualitative agreement with Eq. (6.5a) [100]. Most of the experimental error appears to result from bistability phenomena encountered above the threshold.…”

Section: (65)mentioning

confidence: 94%

Section: (65)mentioning

confidence: 99%

Section: Relaxation Data and Instability Controlmentioning

confidence: 99%

See 1 more Smart Citation

Ferromagnetic Resonance at High Power

Damon¹

1963

Magnetism

View full text Add to dashboard Cite

“…Our main interest is in ferromagnetic insulators, where the dominant interaction is the Heisenberg exchange coupling J S i S j . It is well known that a strong microwave magnetic field applied parallel to the dc field can give rise to parametric excitation of spin waves [58,61,62]. In this technique the wave number of the potentially unstable spin waves can be changed by varying the dc magnetic field.…”

Section: B Kinetic Equations For Magnons and Phononsmentioning

confidence: 99%

Generalized Kinetic and Evolution Equations in the Approach of the Nonequilibrium Statistical Operator

Kuzemsky

2005

Int. J. Mod. Phys. B

View full text Add to dashboard Cite

The method of the nonequilibrium statistical operator developed by D. N. Zubarev is employed to analyse and derive generalized transport and kinetic equations. The degrees of freedom in solids can often be represented as a few interacting subsystems (electrons, spins, phonons, nuclear spins, etc.). Perturbation of one subsystem may produce a nonequilibrium state which is then relaxed to an equilibrium state due to the interaction between particles or with a thermal bath. The generalized kinetic equations were derived for a system weakly coupled to a thermal bath to elucidate the nature of transport and relaxation processes. It was shown that the "collision term" had the same functional form as for the generalized kinetic equations for the system with small interactions among particles. The applicability of the general formalism to physically relevant situations is investigated. It is shown that some known generalized kinetic equations (e.g. kinetic equation for magnons, Peierls equation for phonons) naturally emerges within the NSO formalism. The relaxation of a small dynamic subsystem in contact with a thermal bath is considered on the basis of the derived equations. The Schrodinger-type equation for the average amplitude describing the energy shift and damping of a particle in a thermal bath and the coupled kinetic equation describing the dynamic and statistical aspects of the motion are derived and analysed. The equations derived can help in the understanding of the origin of irreversible behavior in quantum phenomena.

show abstract

A Quantum Statistical Theory of Ferromagnetic Resonance with Parallel Pumping. II Correlation Function Treatment of Parametric Spin Wave Excitation and Nonlinear Interactions

Klupsch

1969

Annalen der Physik

View full text Add to dashboard Cite

A bstrac tBaaed on equations, symmetry and boundary conditions of quantum statistical correhtion functions of renormalized spin wave excitations in a HEISENBERG fernmagnet including dipolar coupling, the parallel pumping effect under special considering the nonlinear three magnon interaction is discmeed. An clsymptotic approximation procedure enableaus to interpret the fundamental equations in terms of the LANGE~IN theory of BRomian motion and to find solutions by eeperation ansatzea. For all WE of practical intereet, the differences between the clwical and the quantum statistical threshold condition can be neglected. The validity of QCHL~MANN'E subthreshold X" formula is proved. Above the threshold, the steady state X" is larger than proposed by semicla~~ical theoriea because the strongly excited spin waves are influenced by a certain nonlinear 5uctuating field; for YIG, a sufficient agreement between experimental and theoretical X" values and a qualitative explanation of the parameter dependence are found. Some non-equilibrium correlation functions are given explicitly.

show abstract

Investigations of Spin-Wave Interactions by the Parallel Pumping Technique

Cited by 17 publications

References 9 publications

Ferromagnetic Resonance at High Power

Ferromagnetic Resonance at High Power

Generalized Kinetic and Evolution Equations in the Approach of the Nonequilibrium Statistical Operator

A Quantum Statistical Theory of Ferromagnetic Resonance with Parallel Pumping. II Correlation Function Treatment of Parametric Spin Wave Excitation and Nonlinear Interactions

Contact Info

Product

Resources

About