Kinetic description of collective oscillations in a system of parametric spin waves II. Inhomogeneous collective modes

1982 ◽  
Vol 53 (2) ◽  
pp. 1142-1149 ◽  
Author(s):  
V. G. Morozov ◽  
A. N. Mukhai
Keyword(s):  
Spin Waves ◽  
Collective Modes ◽  
Kinetic Description ◽  
Parametric Spin ◽  
Collective Oscillations

Characteristics of parametric spin waves in rectangular magnonic blocks

2021 ◽  
Author(s):  
Seong Hwang ◽  
Seungha Yoon ◽  
Byungro Kim ◽  
Songhee Han ◽  
B K Cho
Keyword(s):  
Spin Waves ◽  
Parametric Spin

Collective Oscillations in a Simple Metal. I. Spin Waves

1970 ◽  
Vol 2 (11) ◽  
pp. 4656-4678 ◽  
Author(s):  
Andrew Wilson ◽  
D. R. Fredkin
Keyword(s):  
Spin Waves ◽  
Simple Metal ◽  
Collective Oscillations

scholarly journals Effect of probing signal on the output signals spectrum of nonlinear spin waves in a cross based on waveguides of iron-yttrium garnet film

2021 ◽  
Vol 29 (5) ◽  
pp. 812-828
Author(s):  
Aleksandr Kozhevnikov ◽  
◽  
Galina Dudko ◽  
Yuri Khivintsev ◽  
Valentin Sakharov ◽  
...  
Keyword(s):  
Spin Waves ◽  
Parametric Instability ◽  
Signal Frequency ◽  
Probing Signal ◽  
Parametric Spin ◽  
Pump Signal ◽  
Pass Through ◽  
Iron Garnet ◽  
Objective Detection ◽  
The Waves

Subject. A change in the spectrum of spin waves (SW) in a magnetic cross is investigated when two signals pass through it: a pump signal and a probe signal. Objective. Detection of specific features in formation of the spectra of the output signals of SW in the multiport structure based on a yttrium iron garnet (YIG) film in the case of excitation of two magnetostatic surface waves (MSSW) simultaneously by the input antenna, where the first, with power higher than the first-order parametric instability threshold is the pump, and the second one is a probe. Methods. The experiments were performed for a cross structure from YIG film in the form of two orthogonal waveguides with the SW wire antennas placed at the ends of the waveguides, where one of the antennas on the transversely magnetized waveguide was considered as the input. Result. It was found that by choosing the probing signal frequency, one can significantly (by 10 dB) change the relative signal levels for the satellite waves at the output antennas, which are secondary MSSWs with some new frequencies and appear in the output signals spectrum as a result of the thresholdless processes of merging of parametric spin waves generated by MSSW pumping. In this case the secondary MSSWs frequencies can differ at the output antennas located on orthogonal waveguides. Discussion. The discovered effect is associated with the nonreciprocal nature of propagation of both the pumping wave and the waves generated at parametric instability condition in the structure.

Measurement of modulation response as a new method for study of parametric spin waves

1986 ◽  
Vol 54-57 ◽  
pp. 1151-1153 ◽  
Author(s):  
V.I. Ozhogin ◽  
A.V. Andrienko ◽  
V.L. Safonov ◽  
A.Yu. Yakubovsky
Keyword(s):  
Spin Waves ◽  
New Method ◽  
Modulation Response ◽  
Parametric Spin

Density waves in disk galaxies

1967 ◽  
Vol 31 ◽  
pp. 313-317 ◽  
Author(s):  
C. C. Lin ◽  
F. H. Shu
Keyword(s):  
Mathematical Analysis ◽  
Spiral Structure ◽  
Stellar System ◽  
Collective Modes ◽  
Disk Galaxies ◽  
Spiral Pattern ◽  
Density Waves ◽  
The Galaxy ◽  
Detailed Mathematical Analysis

Density waves in the nature of those proposed by B. Lindblad are described by detailed mathematical analysis of collective modes in a disk-like stellar system. The treatment is centered around a hypothesis of quasi-stationary spiral structure. We examine (a) the mechanism for the maintenance of this spiral pattern, and (b) its consequences on the observable features of the galaxy.

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