Izvestiya of Saratov University.

Physics

ISSN 1817-3020 (Print)
ISSN 2542-193X (Online)

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Vysotskii S. L., Seleznev M. E., Amakhanov G. M., Nikulin Y. V. Influence of crystallographic anisotropy of unsaturated yttrium iron garnet film on spin injection in platinum film by the mechanism of inverse spin Hall effect. Izvestiya of Saratov University. Physics , 2025, vol. 25, iss. 1, pp. 44-52. DOI: 10.18500/1817-3020-2025-25-1-44-52, EDN: IJAXHF

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Published online: 
31.03.2025
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Language: 
Russian
Heading: 
Physics of condensed matter
Article type: 
Article
UDC: 
537.86.4
DOI: 
10.18500/1817-3020-2025-25-1-44-52
EDN: 
IJAXHF

Influence of crystallographic anisotropy of unsaturated yttrium iron garnet film on spin injection in platinum film by the mechanism of inverse spin Hall effect

Autors: 
Vysotskii Sergei Lvovich, Saratov State University
Seleznev Mikhail E., Saratov Branch of Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences
Amakhanov Gaidar M., Saratov Branch of Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences
Nikulin Yury Vasil'evich, Saratov Branch of Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences
Abstract: 

Background and Objectives: Thin-film structures of yttrium iron garnet ferrite film – platinum are actively studied due to the possibility of using the direct (for converting electric current in platinum into spin waves in ferrite) and inverse (injection of spin current from ferrite into platinum film) spin Hall effects for application in magnonics and spintronics devices. Materials and Methods: The structures studied in this work were obtained on the basis of yttrium iron garnet films of crystallographic orientations (100) and (111), from which waveguides were cut out, in which spin waves were excited. Their propagation was monitored using a vector network analyzer. A platinum film in the form of stripe oriented along the long axis of the waveguide was fabricated on the surface of the waveguides using magnetron sputtering, photolithography, and ion etching. Spin injection from ferrite film in the platinum film results in electric charge current generation. An experimentally measured value was the electromotive force between contacts to the platinum stripe. It was measured using a synchronous detector. The measurements were carried out at magnetization field values lower than the saturation field of the ferrite film, with the magnetic structure of the film being divided into domains. Results and Conclusions: It has been shown that for both crystallographic orientations the maximum spin injection is achieved when magnetizing the waveguides along the easy magnetization axis and symmetrical domain structure is formed.

Key words: 
yttrium iron garnet
spin waves
crystallographic anisotropy
magnetic domains
inverse spin Hall effect
Acknowledgments: 
This work was supported by the Russian Science Foundation (project No. 24-29-00640).
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Received: 
13.09.2024
Accepted: 
16.10.2024
Published: 
31.03.2025
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