Abstract
The fine structure of YBa2Cu3Oy single crystals with a different oxygen content subjected to a low-temperature hydrogenation have been investigated by transmission electron microscopy. It has been shown that as a result of the action of hydrogen at T = 150°С, a partial reduction of copper occurs, accompanied by the precipitation of Cu crystallites of ~100 nm in size and the formation of various structural defects. The geometric configuration of the precipitated crystallites has been considered. The results obtained show that hydrogenation is a method that makes it possible to control the structure by introducing nanosized inclusions and defects, which can be pinning centers of the magnetic vortices.
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ACKNOWLEDGMENTS
The investigations were performed using the equipment of the Center of Collaborative Access “Test Center of Nanotechnologies and Advanced Materials,” Institute of Metal Physics, Ural Branch, Russian Academy of Sciences.
Funding
The work was performed within the framework of the state task of the Ministry of Education and Science of Russia according to the themes “Davlenie,” no. АААА-А18-118020190104-3, and “Spin,” no. АААА-А18-118020290104-2.
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Translated by G. Salnikov
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Kuznetsova, E.I., Krinitsina, T.P., Bobylev, I.B. et al. Structure Defects Formed upon the Hydrogenation of YBa2Cu3Oy Single Crystals. Phys. Metals Metallogr. 121, 554–560 (2020). https://doi.org/10.1134/S0031918X20060101
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DOI: https://doi.org/10.1134/S0031918X20060101