Interaction of Y[Ba.sub.2][Cu.sub.3][O.sub.6.8] with atmospheric moisture during low-temperature annealing

The interaction of Y[Ba.sub.2][Cu.sub.3][O.sub.6.8] (123) with water vapors at T = 200°C and the water influence on the structure and electrophysical properties of the compound have been studied using Raman spectroscopy, magnetometry, and X-ray diffraction. It has been found that the penetration of...

Full description

Saved in:
Bibliographic Details
Published in:Physics of the solid state 2014-08, Vol.56 (8), p.1536
Main Authors: Bobylev, I.B, Ponosov, Yu. S, Zyuzeva, N.A
Format: Article
Language:English
Subjects:
Annealing
Diffraction
Superconductors
X-rays
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The interaction of Y[Ba.sub.2][Cu.sub.3][O.sub.6.8] (123) with water vapors at T = 200°C and the water influence on the structure and electrophysical properties of the compound have been studied using Raman spectroscopy, magnetometry, and X-ray diffraction. It has been found that the penetration of water into the 123 structure leads to its transition to a hydride-oxyhydroxide [H.sub.2x- z]Y[Ba.sub.2][Cu.sub.3][O.sub.y+x-z][(OH).sub.z] containing fragments of the 124-type structure and exhibiting the spectrum of two-magnon scattering characteristic of antiferromagnetic 123 a compositions; in this case, the superconducting properties of the material as a whole are conserved. After short-time recovery annealing and subsequent oxidation, the water is removed from the compound structure, which leads to the disappearance of the spectrum of spin fluctuations. A possible mechanism of change in the 123 structure upon hydrogen and water intercalation has been discussed.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783414080058