Nucleation and growth of a flux instability in superconductingYBa2Cu3 | Zendy

P. Leiderer | Zendy; J. Boneberg | Zendy; P. Brüll | Zendy; V. Bujok | Zendy; Stephan Herminghaus | Zendy

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Nucleation and growth of a flux instability in superconductingYBa2Cu3

Author(s) -

P. Leiderer,

J. Boneberg,

P. Brüll,

V. Bujok,

Stephan Herminghaus

Publication year - 1993

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.71.2646

Subject(s) - instability , nucleation , superconductivity , physics , flux (metallurgy) , condensed matter physics , magnetic flux , magnetic field , materials science , thermodynamics , quantum mechanics , metallurgy

Using a high speed magneto-optic technique we have investigated the dynamics of a new flux instability in thin superconducting YBa2Cu3O7−x films exposed to an external magnetic field of several 10−2 T. The instability was nucleated by a 5 ns laser pulse, which heated a small spot of the sample in a region of high shielding currents. Two subsequent regimes in the development of the instability are discovered, which give rise to strikingly different flux distributions. The formation of flux branches, which are characteristic for the second stage, occurs on a time scale of a hundred nanoseconds

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