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Fluctuation-induced anisotropic magnetoconductivity in oxygen-deficient YBa2Cu3O7-δthin films

✍ Scribed by W. Göb; W. Lang; W. Kula; Roman Sobolewski

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
157 KB
Volume
21
Category
Article
ISSN
0749-6036

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✦ Synopsis

We report on measurements of both the longitudinal and transverse magnetoresistivity (MR) of oxygen-reduced YBa 2 Cu 3 O 7-δ (YBCO) thin films with critical temperatures between T c = 55 K and T c = 89 K. We find the MR solely caused by the suppression of superconducting fluctuations by a magnetic field. In fully oxygenated samples both the Aslamazov-Larkin process (AL) and another, presumably the Maki-Thompson process (MT), contribute to the MR. In oxygen-deficient samples the MT process unambiguously is absent, thus indicating an unconventional (non-s-wave) pairing symmetry in YBCO.

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