Affordable Access

Publisher Website

Low temperature Raman study of the YBa2Cu3Ox(6.44≤x≤6.98) superconductor

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/s0921-4534(97)00618-7
Disciplines
  • Physics

Abstract

Abstract Microcrystallites of the series of YBa 2Cu 3O x superconductors with oxygen doping in the range 6.44≤x6.98 have been studied by Raman spectroscopy at low temperatures. The abrupt softening of the O(2,3) in-phase phonon above optimum doping, previously reported at room temperature persists to the lowest temperatures studied (∼5K). The dependence of the linewidth of this mode on the oxygen concentration at low temperatures agrees, in general, with the already known room temperature dependence, except at the optimum doping where the phonon remains very wide, an indication of a phase transition. The temperature dependence of the phonon characteristics of the in-phase plane oxygen mode indicate an anharmonic behaviour which increases with decreasing x, in agreement with previously reported data at room temperature obtained with oxygen isotopic substitution. A similar anharmonicity but to a lesser degree is also observed for the apical phonon.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Low temperature behavior of the YBa2Cu3O6+2xphase...

on Physica C Superconductivity Jan 01, 1989

Low-temperature oxidation of ceramic superconducto...

on Physica C Superconductivity Jan 01, 1992

Low temperature oxygen ordering in YBa2Cu3O6+χ

on Solid State Communications Jan 01, 1993
More articles like this..