Effect of hydrogen intercalation on the critical parameters of YBa2Cu3Oy


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The effect of hydrogenation at T = 150 and 200°C on the electrophysical properties of highly textured YBa2Cu3Oy ceramics with different oxygen content has been investigated. Like hydration, hydrogenation results in the deterioration of these properties. However, in samples with high oxygen contents (y = 6.96) hydrogenated at T = 150°C after oxidation (400°C) or recovery annealing with subsequent oxidation, the critical current density and first critical field increase compared to the initial state. The improvement of the properties occurs mainly in a magnetic field applied perpendicularly to the c axis. As after hydration, this is connected with the formation of planar defects in the course of low-temperature annealing. In addition, in the process of the hydrogenation, the partial reduction of copper occurs with the formation of microinclusions of Cu2O and other products of chemical decomposition, which are extra pinning centers of magnetic vortices.

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I. Bobylev

Institute of Metal Physics, Ural Branch

编辑信件的主要联系方式.
Email: bobylev@imp.uran.ru
俄罗斯联邦, ul. S. Kovalevskoi 18, Ekaterinburg, 620990

E. Gerasimov

Institute of Metal Physics, Ural Branch; Ural Federal University

Email: bobylev@imp.uran.ru
俄罗斯联邦, ul. S. Kovalevskoi 18, Ekaterinburg, 620990; ul. Mira 19, Ekaterinburg, 620002

N. Zyuzeva

Institute of Metal Physics, Ural Branch

Email: bobylev@imp.uran.ru
俄罗斯联邦, ul. S. Kovalevskoi 18, Ekaterinburg, 620990

P. Terent’ev

Institute of Metal Physics, Ural Branch; Ural Federal University

Email: bobylev@imp.uran.ru
俄罗斯联邦, ul. S. Kovalevskoi 18, Ekaterinburg, 620990; ul. Mira 19, Ekaterinburg, 620002

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