NDLI: YBa$_{2}$Cu$_{3}$O$_{7 − x}$ 240 K Phase Transition

Content Provider	Springer Nature Link
Author	Dul'kin, E.
Copyright Year	2002
Abstract	YBa$_{2}$Cu$_{3}$O$_{7 − x }$ ceramic samples have been investigated simultaneously by the thermal expansion and the acoustic emission methods during thermocycling through 200–300 K into liquid nitrogen steam. No jumps in the dilatation curves but change in the slope of one has been found at 228 and 234 K on heating and cooling respectively. These points are accompanied by the acoustic emission signals, a small value testifying for oxygen atoms displacement into the crystal lattice. On the basis of these measured experimental data, a thermal expansion coefficient α and a specific capacity c $_{m}$ have been calculated. By this c $_{m}$ value an oxygen atom activation energy ΔE = 0.15 eV has been calculated. It is shown that an isostructural oxygen-displacement second-order phase transition takes place between certain orthorhombic phases in YBa$_{2}$Cu$_{3}$O$_{7 − x }$ near 240 K.
Starting Page	527
Ending Page	529
Page Count	3
File Format	PDF
ISSN	08961107
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	15
Issue Number	6
e-ISSN	15729605
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2002-01-01
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Characterization and Evaluation Materials Condensed Matter Solid State Physics and Spectroscopy
Content Type	Text
Resource Type	Article
Subject	3100/3101 Condensed Matter Physics Electronic, Optical and Magnetic Materials

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