Nanosecond magneto-optic study of a new instability in thin YBa2Cu3O7−x films | Zendy

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

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Nanosecond magneto-optic study of a new instability in thin YBa2Cu3O7−x films

Author(s) -

V. Bujok,

P. Brüll,

J. Boneberg,

Stephan Herminghaus,

P. Leǐderer

Publication year - 1993

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.110009

Subject(s) - instability , nanosecond , magnetic flux , superconductivity , thin film , materials science , electromagnetic shielding , optics , condensed matter physics , flux (metallurgy) , laser , physics , magnetic field , nanotechnology , mechanics , composite material , quantum mechanics , metallurgy

We have investigated the dynamics of flux penetration into thin superconducting YBa2Cu3O7−x films using a magneto‐optic technique with nanosecond time resolution. For films carrying large shielding currents an instability in the magnetic flux distribution is discovered, which can be triggered by a local perturbation, e.g., by a focused laser pulse. The instability develops in the form of fine ramified flux structures, with a propagation speed of the flux front on the order of 5×104 m/s

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