Superconducting transition of high-Tc cuprates in a magnetic field

W. Lang, P. Gehringer, E. Stangl, S. Proyer

The influence of a magnetic field on the shape of the superconducting transition
is dramatically different in high temperature superconductors as compared to
conventional superconductors. A consistent description of these unconventional
phenomena is crucial for the design of practical applications of the cuprate
superconductors. We report measurements of the superconducting transition in
c-axis oriented TmBa2Cu3O7-δ and TmBaSrCu3O7-δ thin films In magnetlc fields
up to 13 T, applied in the transverse (B||c) and longitudinal (B˪c) directions. The
upper part of the transition is dominated by critical order parameter fluctuations
and the characteristic "fan-shape" of the resistivity curves can be quantitatively
described by a recent anisotropic renormalized fluctuation theory.

Electronic Properties of Materials
External organisation(s)
Johannes Kepler Universität Linz, Universität Wien
No. of pages
Publication date
Austrian Fields of Science 2012
103033 Superconductivity, 103009 Solid state physics, 103018 Materials physics
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