Abstract
The effect vapors of the simplest cyclic hydrocarbons have on the structure of YBa2Cu3Oy (123) with high (у = 6.96) and low (у = 6.3) oxygen concentrations at low temperatures (200–300°C) is studied. It is found that the hydration of 123 proceeds during low-temperature treatment in vapors of these hydrocarbons. The planar packing defects form in YBa2Cu3Oy in optimum amounts along with second-phase inclusions formation as a result of the reduction of copper. The formed centers of pinning can improve the critical properties of HTSC materials in strong magnetic fields.
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ACKNOWLEDGMENTS
Powder X-ray diffraction and magnetometric measurements were performed on equipment at the Testing Center of Nanotechnologies and Promising Materials, Institute of Metal Physics, Ural Branch, Russian Academy of Sciences. Chromatographic analysis was conducted at the Center for the Spectroscopy and Analysis of Organic Compounds, Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences.
The authors are grateful to A.V. Korolev and V.S. Gaviko for performing our magnetometric and powder X-ray diffraction measurements; and to M.G. Pervova for performing our chromatographic analysis.
Funding
This work was performed as part of a State Task from the Ministry of Higher Education and Science of the Russian Federation (“Pressure,” project no. AAAA-A18-118020190104-3 and “Spin,” project no. AAAA-A18-118020290104-2). It was partially supported by the Russian Academy of Sciences, Ural Branch, project no. 18-10-2-24.
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Bobylev, I.B., Zyuzeva, N.A. & Naumov, S.V. Effect of Cyclic Hydrocarbon Vapors on the Structure of YBa2Cu3Oy. Russ. J. Phys. Chem. 93, 2465–2471 (2019). https://doi.org/10.1134/S0036024419120045
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DOI: https://doi.org/10.1134/S0036024419120045