Hydrogen in a Nonstoichiometric YBa2Cu3O6.96 Compound: Study by Raman Spectroscopy

Raman spectroscopy has been used to study the interactions between the YBa 2 Cu 3 O 6.96 compound (123) and hydrogen at 150–200°C and their effects on the structure. It has been found that, when the YBa 2 Cu 3 O 6.96 compound is subjected to hydrogen intercalation and hydration, the transformation o...

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Bibliographic Details
Published in:Physics of metals and metallography 2018-07, Vol.119 (7), p.643-649
Main Authors: Bobylev, I. B., Ponosov, Yu. S., Zyuzeva, N. A., Terent’ev, P. B.
Format: Article
Language:English
Subjects:
Antiferromagnetism
Chemistry and Materials Science
Diffusion
Hydrogen storage
Materials Science
Metallic Materials
Phase Transformations
Raman spectra
Raman spectroscopy
Spectroscopic analysis
Spectrum analysis
Structure
Variations
YBCO superconductors
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Summary:Raman spectroscopy has been used to study the interactions between the YBa 2 Cu 3 O 6.96 compound (123) and hydrogen at 150–200°C and their effects on the structure. It has been found that, when the YBa 2 Cu 3 O 6.96 compound is subjected to hydrogen intercalation and hydration, the transformation of 123 into tetragonal phase (pseudo-124) takes place. In this case, Raman spectra of the YBa 2 Cu 3 O 6.96 compound, similarly to those of a compound with absorbed water, exhibit antiferromagnetic fluctuations that are not typical of the compound. After hydrogenation, the 123 compound absorbs water under normal conditions and oxygen at temperatures below 300°C.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X18070025