Results 181 to 190 of about 2,177 (228)

SPIN-WAVE EXPERIMENTS: PARAMETRIC EXCITATION OF ACOUSTIC WAVES AND MODE-LOCKING OF SPIN WAVES

Applied Physics Letters, 1970
In a spin-wave instability experiment, a YIG disk was bonded onto a quartz rod with a transducer attached to it, and was placed in a microwave cavity in a parallel-pumping arrangement. For microwave power above the threshold for spin-wave instability, parametric generation of acoustic waves was observed. The generation was evidenced by the simultaneous
S. Wang, Ta-lin Hsu
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Parametric excitation of spin waves in uniaxial ferrites

Technical Physics, 1998
Parametric excitation of spin waves in uniaxial ferrites with large anisotropy is investigated theoretically. First-order processes in a sphere with arbitrary orientation of an external static magnetic field, in which case the pumping is oblique, are studied.
A. V. Nazarov, A. G. Gurevich
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Parametric excitation of spin waves by phonon pumping

Journal of Applied Physics, 1973
Parametric excitation of spin waves by a traveling phonon pump is possible because of the magnetoelastic interaction. Expressions for the threshold phonon intensity required for spin-wave pair excitation are presented. The functional dependence of the threshold intensity on pump frequency, internal field, and other pertinent parameters has been ...
Donald H. Lyons, H. Matthews
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Nonlinear Parametric Excitation of Spin Waves

1998
This work is devoted to the nonlinear effects which are connected with parametric interaction of spin waves in ferrites. Parametric processes under the action of both single and numerous microwave signals are considered. The number of original results on amplification of backward volume wave envelope solitons, phase conjugation of pulse signal and echo
G. A. Melkov, A. A. Serga
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Nonlinear radiation damping of parametrically excited spin waves

Journal of Magnetism and Magnetic Materials, 1996
We consider the process of microwave parametric excitation of spin waves in a resonator. The interaction of the resonator cavity photon with the parametric magnon pair is expected to cause additional nonlinearity: nonlinear radiation damping which is proportional to the quality factor Q of the resonator.
V.L. Safonov, H. Yamazaki
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Spin-wave turbulence beyond the parametric excitation threshold

Soviet Physics Uspekhi, 1974
The nonlinear stage of the parametric excitation of spin waves in ferromagnetic dielectrics is reviewed. The main nonlinear mechanism which limits the amplitude of the exponentially growing waves is the pairing of waves with equal and opposite wave vectors, which leads to the violation of phase relationships.
Vladimir E. Zakharov, V.S. L'vov, S.S. Starobinets   +2 more
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Temperature-Induced Nonlinearity at Parametrically Excited Spin Waves

Europhysics Letters (EPL), 1991
Parametrically excited spin waves in magnetic spheres of yttrium iron garnet give rise to complex multistable behaviour, which occurs for special experimental conditions at room temperature, but vanishes at helium temperature. This is in contrast to what one expects from the decreasing damping of the spin waves with temperature, which should result in ...
G Wiese, H.-A. Krug Von Nidda, H Benner
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Spin effect on parametric interactions of waves in magnetoplasmas

Physics of Plasmas, 2012
The parametric decay instability of upper hybrid wave into low-frequency electromagnetic Shear Alfvén wave and Ordinary mode radiation (O-mode) has been investigated in an electron-ion plasma immersed in the uniform external magnetic field. Incorporating quantum effect due to electron spin, the fluid model has been used to investigate the linear and ...
M. Shahid, D. B. Melrose, M. Jamil, G. Murtaza   +3 more
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Parametric spin wave testing by observation of transition processes

Journal of Magnetism and Magnetic Materials, 1990
Abstract Relaxation rates and coupling coefficients of spin waves have been determined in the layered ferromagnet ( CH 3 NH 3 ) 2 CuCl 4 . The parameters could be measured by observing the transient response of the parallel pumped microwave absorption to rapid magnetic field changes.
A.I. Smirnov, P. Erhart, B. Senning, F. Waldner   +3 more
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PARAMETRIC EXCITATION OF SPINNING TEST PARTICLES BY GRAVITATIONAL WAVES

The Ninth Marcel Grossmann Meeting, 2002
One of the most striking predictions of Einstein's theory of gravitation is the existence of gravitational waves. Such waves are thought to be produced by astrophysical phenomena ranging from the coalescence of orbiting binaries to violent events in the early Universe.
Mohseni, Morteza, Tucker, Robin, Wang, Charles   +2 more
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