ISSN 0869-6632 (Print)
ISSN 2542-1905 (Online)

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Seleznev M. E., Nikulin Y. V., Khivintsev Y. V., Vysotskii S. L., Kozhevnikov A. V., Sakharov V. K., Dudko G. M., Filimonov Y. A. Influence of parametric instability on spin pumping by dipole-exchange magnetostatic surface waves in YIG–Pt structures. Izvestiya VUZ. Applied Nonlinear Dynamics, 2023, vol. 31, iss. 2, pp. 225-242. DOI: 10.18500/0869-6632-003032, EDN: JYXDDE

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Language: 
Russian
Heading: 
Nonlinear Waves. Solitons. Autowaves. Self-Organization.
Article type: 
Article
UDC: 
537.86
DOI: 
10.18500/0869-6632-003032
EDN: 
JYXDDE

Influence of parametric instability on spin pumping by dipole-exchange magnetostatic surface waves in YIG–Pt structures

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

The purpose of this work is to study the influence of four-magnon (4M) parametric instability on spin pumping by dipole-exchange magnetostatic surface waves (MSSW) with the help of the inverse spin Hall effect (ISHE) in structures based on yttrium-iron garnet (YIG) and platinum (Pt).

Methods. The experiments were carried out using the delay line structures based on YIG(900 nm)/Pt(9 nm) where electromotive force (EMF) induced by ISHE demonstrates a growth at the frequencies of the resonant interaction between MSSW and volume exchange modes. The frequency dependencies of the amplitude and phase for the delay line structure and EMF (U(f)) from the platinum layer were studied as a function of the MSSW power.

Results. It was shown that the resonant EMF growth at the frequencies of dipole-exchange resonances is caused by the presence of Van Hove singularities in the density of states for spin waves at such frequencies that leads to an increase in the efficiency of electron-magnon scattering at the YIG–Pt interface. A growth in MSSW power beyond the threshold of 4M instability development results in a “smoothing” of resonant particularities in the EMF frequency dependence U(f) that can be explained by decreasing efficiency of spin pumping due to destruction of dipole-exchange resonances and related singularities in the density of states of spin waves.

Conclusion. Obtained results may be of interest for the development of highly sensitive spin current detectors, as well as for the implementation of spintronic devices. 

Key words: 
parametric spin waves
spin pumping
YIG–Pt structures
electron-magnon decay
Van Hove singularities
Acknowledgments: 
The work was supported by RSF grant No. 22-19-00500
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Received: 
13.12.2022
Accepted: 
03.02.2023
Available online: 
20.03.2023
Published: 
31.03.2023
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