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Effect of Oxygen Concentration on the Resistive Superconducting Transition of YBa 2 Cu 3 O 7− x in High Magnetic Field
Author(s) -
Fuchs G.,
Gladun A.,
Drechsler S. L.,
Mueller R.,
Ritschel M.,
Krabbes G.,
Koppetzki N.,
Gilewski A.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221590227
Subject(s) - activation energy , electrical resistivity and conductivity , resistive touchscreen , superconductivity , condensed matter physics , oxygen , magnetic field , materials science , transition temperature , curvature , chemistry , physics , electrical engineering , organic chemistry , quantum mechanics , engineering , geometry , mathematics
The resistivity, T c and H c2 are studied in YBa 2 Cu 3 O 7− x as a function of oxygen deficiency for 0 < x < 0.46. For small x the resistive transition is dominated by thermally activated flu x creep. The temperature dependence of the activation energy is discussed. For x = 0.46, the influence of thermal activation could be neglected and a pronounced positive curvature of H c2 ( T ) and H c2 (0) > 45 T is found.