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Magnetic‐field‐induced damage in a superconducting YBa 2 Cu 3 O 7−x film
Author(s) -
Brüll P.,
Kirchgässner D.,
Leiderer P.,
Berberich P.,
Kinder H.
Publication year - 1992
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19925040402
Subject(s) - superconductivity , condensed matter physics , materials science , magnetic field , field (mathematics) , physics , quantum mechanics , mathematics , pure mathematics
Abstract During investigations of the magnetic flux dynamics in thin superconducting YBa 2 Cu 3 O 7−x films we have observed the spontaneous formation of a damage in the film, apparently induced by the applied magnetic field of 0.1 T . The damage developed within less than 40 ms (the time resolution of the experiment) and showed up in the magnetiooptically recorded image of the flux above the sample as a path for massive flux penetration. A subsequent analysis revealed a 1 μm wide gap in the YBa 2 Cu 3 O 7−x film which had developed over a major portion of the 1 · 1 cm 2 sample. It is suggested that the film locally melted as a result of an instability of the superconductor in the critical state.