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Kozhevnikov A. V., Dudko G. M., Khivintsev Y. V., Sakharov V. K., Vysotskii S. L., Nikulin Y. V., Seleznev M. E., Khitun A. G., Filimonov Y. A. Effect of probing signal on the output signals spectrum of nonlinear spin waves in a cross based on waveguides of iron-yttrium garnet film. Izvestiya VUZ. Applied Nonlinear Dynamics, 2021, vol. 29, iss. 5, pp. 812-828. DOI: 10.18500/0869-6632-2021-29-5-812-828

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Russian
Heading: 
Nonlinear Waves. Solitons. Autowaves. Self-Organization.
Article type: 
Article
UDC: 
537.622.2; 537.862
DOI: 
10.18500/0869-6632-2021-29-5-812-828

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

Autors: 
Kozhevnikov Aleksandr Vladimirovich, Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
Dudko Galina Mihajlovna, Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
Khivintsev Y. V., Saratov State University
Sakharov Valentin Konstantinovich, Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
Vysotskii S. L., Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
Nikulin Y. V., Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
Seleznev M. E., Saratov State University
Khitun Aleksander Georgievich, University of California-Riverside
Filimonov Y. A., Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
Abstract: 

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.

Key words: 
parametric spin waves
spin wave interference
microwave guide
spintronics
magnonics
micromagnetic modeling
Acknowledgments: 
The study was carried out with the financial support of the Russian Science Foundation (project no. 17-19-01673). The work of A. Khitun was supported in part by the INTEL CORPORATION (Award #008635, Spin Wave Computing) (Project director is Dr. D. E. Nikonov). The authors express their gratitude to A. G. Rozhnev for a useful discussion of the results of the work
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Received: 
07.12.2020
Accepted: 
01.02.2021
Published: 
30.09.2021
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