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The interaction of hydrogen with YBa2Cu3Oy (123) at t = 150–200 C and the effect of hydrogen on the structure have been investigated by Raman spectroscopy. It has been found that, when the YBa2Cu3O6.96 compound is subjected to hydrogen intercalation, the transformation of 123 into the tetragonal pseudo-124 phase takes place similar to the case of hydration. In this case, the Raman spectra of the YBa2Cu3O6.96 compound, similarly to those of a compound with absorbed water, exhibit antiferromagnetic fluctuations, which are not typical for the compound. Unlike YBa2Cu3O6.96, the compound with low oxygen content (YBa2Cu3O6.3) is less prone to the formation of stacking faults and, under hydrogenation, the 123 phase does not transfer into the pseudo-124 phase.

EFFECT OF HYDROGEN INTERCALATION ON THE STRUCTURE OF YBa2Cu3Oy HAVING DIFFERENT OXYGEN CONTENT