Abstract
The effect of the treatment with acetone vapor on the structure of YBa2Cu3Oy (123) with high (y = 6.96) and low (y = 6.3) contents of oxygen is studied at temperatures of 200–250°C. It is found that 123 is hydrated during the treatment with acetone vapor. This leads to the formation of planar stacking defects and transition of 123 to a pseudo-124 phase. It is also shown that inclusions of second phases are released, due to the reduction of copper by acetone, which (like stacking defects) can act as pinning centers and facilitate the enhancement of critical characteristics in high magnetic fields.
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ACKNOWLEDGMENTS
X-ray and magnetometric measurements were made on the equipment of the Institute of Metal Physics’ Test Center of Nanotechnologies and Advanced Materials. The chromatographic analysis was performed at the SAOS shared resource center of the Institute of Organic Synthesis.
The authors are grateful to their colleagues А.V. Korolev and V.S. Gaviko from the resource center for making the magnetometry and X-ray diffraction measurements, and to M.G. Pervova for performing the chromatographic analysis.
Funding
This work was performed as part of a State Task from the RF Ministry of Education and Science, topic nos. АААА-А18-118020190104-3 (“Pressure”) and АААА-А18-118020290104-2 (“Spin”).
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Bobylev, I.B., Naumov, S.V. & Zyuzeva, N.A. Transformation of the Structure of YBa2Cu3Oy after Exposition to Acetone Vapor. Russ. J. Phys. Chem. 94, 1375–1381 (2020). https://doi.org/10.1134/S0036024420070079
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DOI: https://doi.org/10.1134/S0036024420070079