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Surface Structure of the YBa2Cu3O7 – δ Ceramics after Exposure to Plasma Flow

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Abstract

A series of experiments has been performed to study the effect of plasma flows of argon, nitrogen, and their mixture with oxygen, produced by a dc plasmatron with an expanding channel of the output electrode, on the surface of nanostructured YBa2Cu3O\(_{{7-\delta }}\) (YBCO) ceramics. Nanostructured ceramics S1, S2, S3, and S4 have been fabricated from YBCO powders synthesized by the sol‒gel method, followed by the heat treatment at 350°С (1 h), 910°С (20 h), and 700°C (10 h), with the following densities: ρ1 = 3.5, ρ2 = 5.5, ρ3 = 5.6, and ρ4 = 4.5 g/cm3. The surface morphology and Raman spectra of the superconducting nanostructured ceramics have been investigated before and after exposure to a plasma flow. It has been established that this exposure causes a surface modification in the form of compaction and recrystallization, as well as changes in the oxygen ordering in the structure. Molten monolithically conjugated grains have been found.

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Funding

This study was supported by the Russian Foundation for Basic Research, project no. 18-08-00092a, and carried out within state assignment no. FZNZ-2020-0002.

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Authors and Affiliations

  1. Dagestan State University, 367008, Makhachkala, Russia

    S. Kh. Gadzhimagomedov, M. Kh. Rabadanov, D. K. Palchaev, N. M.-R. Alikhanov, R. M. Emirov, Zh. Kh. Murlieva & P. M. Saypulaev

  2. National Research Centre “Kurchatov Institute”, 123098, Moscow, Russia

    M. Y. Presnyakov

  3. Shubnikov Institute of Crystallography, Federal Scientific and Research Center “Crystallography and Photonics,” Russian Academy of Sciences, 119333, Moscow, Russia

    A. E. Muslimov

  4. Joint Institute for High Temperatures, Russian Academy of Sciences, 125412, Moscow, Russia

    M. Kh. Gadzhiev

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  1. S. Kh. Gadzhimagomedov
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  2. M. Y. Presnyakov
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  3. A. E. Muslimov
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  4. M. Kh. Gadzhiev
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  5. M. Kh. Rabadanov
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  6. D. K. Palchaev
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  7. N. M.-R. Alikhanov
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  8. R. M. Emirov
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  9. Zh. Kh. Murlieva
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  10. P. M. Saypulaev
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Correspondence to S. Kh. Gadzhimagomedov.

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Translated by E. Bondareva

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Gadzhimagomedov, S.K., Presnyakov, M.Y., Muslimov, A.E. et al. Surface Structure of the YBa2Cu3O7 – δ Ceramics after Exposure to Plasma Flow. Crystallogr. Rep. 67, 996–1000 (2022). https://doi.org/10.1134/S1063774522060062

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  • DOI: https://doi.org/10.1134/S1063774522060062

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