An unknown phase transition in YBCO and PBCO cuprates

Access & Terms of Use
metadata only access
Abstract
By means of differential scanning calorimetry, thermogravimetry, and high-temperature x-ray diffraction in different atmospheres, an opposite thermal dynamic change in superconducting and semiconducting cuprates of (Y-123) and (Pr-123) is observed. At about the superconducting Y-123 polycrystals show an endothermal anomaly and a weight loss, while the semiconducting Pr-123 polycrystals show an exothermal anomaly and weight gain. Similar phenomena are also observed in the superconducting and semiconducting Y-123 single crystals at about . High-temperature x-ray diffraction reveals that the lattice parameters of the Y-123 increase significantly at this temperature. We argue that this can be attributed to an unknown phase transition and a thermal instability, which is important for understanding the difference in properties between superconducting and semiconducting cuprates.
Persistent link to this record
DOI
Additional Link
Author(s)
Zhang, Hua
Feng, Q
Wang, S.G.
Zhao, Yong
Ritter, F
Assmus, W
Supervisor(s)
Creator(s)
Editor(s)
Translator(s)
Curator(s)
Designer(s)
Arranger(s)
Composer(s)
Recordist(s)
Conference Proceedings Editor(s)
Other Contributor(s)
Corporate/Industry Contributor(s)
Publication Year
1996
Resource Type
Journal Article
Degree Type
UNSW Faculty