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

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Herminghaus,  Stephan
Group Granular matter and irreversibility, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Bujok, V., Brüll, P., Boneberg, J., Herminghaus, S., & Leiderer, P. (1993). Nanosecond magneto‐optic study of a new instability in thin YBa2Cu3O7−x films. Applied Physics Letters, 63(3), 412-414. doi:10.1063/1.110009.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0029-B604-F
Abstract
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.