Results 191 to 200 of about 2,255 (221)

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 WAVES PARAMETRIC AUTORESONANCE

Физика металлов и металловедение / Physics of Metals and Metallography
This paper is devoted to the investigation of parametric autoresonance of spin waves in ferromagnets with easy-axis anisotropy. It is assumed that both the constant and alternating magnetic fields are oriented along the anisotropy axis. The threshold values of the amplitude of the alternating magnetic field required for autoresonance excitation have ...
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Bifurcation under parametric excitation of spin waves

Soviet Journal of Low Temperature Physics, 1984
Variation of external parameters is shown to cause a rearrangement of the stationary state of the spin system under the conditions of parametric excitation.
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Parametric Excitation of Spin Waves in Ferromagnets with Domain Structure

physica status solidi (b), 1974
AbstractAn investigation is made of the mechanism of the influence of an rf field on ferromagnets with different domain structures leading to a modulation of the internal effective magnetic field, in which the magnetization vector precesses. The calculations are made for the case when external polarizing magnetic field H0 = 0.
B. N. Filippov, V. P. Lukomskii, Yu. G. Lebedev   +2 more
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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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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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Parametric excitation of spin waves in ferrites at low temperatures

Soviet Journal of Low Temperature Physics, 1981
We have experimentally studied parametrically excited spin waves in samples of yttrium iron garnet in the temperature range 4.2–300 °K at a pump frequency of 9.4 GHz. It is shown that rare earth impurities reduce the value of the real and imaginary parts of the nonlinear susceptibility in the region of temperatures where they significantly influence ...
I. V. Krutsenko, G. A. Melkov
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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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Parametric generation of acoustic waves and mode-locking of spin waves through magnetoelastic coupling

IEEE Transactions on Magnetics, 1970
A YIG disk with parallel and polished surfaces was bonded onto a quartz rod with a transducer attached to it. The YIG sample was placed in a microwave cavity in a parallel-pumping configuration. For microwave power several decibels above the threshold for spin-wave instability, parametric generation of low-frequency acoustic waves was observed, and was
null Shyh Wang, null Ta-Lin Hsu
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