Abstract
We used Raman spectroscopy to study the interaction of YBa2Cu3Oy (123) (y ≤ 6.5) with hydrogen at temperatures of 150–200°С. In contrast to the YBa2Cu3O6.96 compound, compositions with low oxygen contents show a lower tendency to form stacking faults. We found that the hydrogenation of these compositions does not lead to the transformation of the 123 phase to the pseudo-124 phase. Absorbed hydrogen does not react with oxygen in 123 and does not form hydroxyl groups. The HxYBa2Cu3Oy oxyhydride is the hydration-reaction product.
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