Nucleation and growth of a flux instability in superconducting YBa2Cu3O7−x films

Leiderer, P.; Boneberg, J.; Brüll, P.; Bujok, V.; Herminghaus, Stephan

doi:10.1103/PhysRevLett.71.2646

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Nucleation and growth of a flux instability in superconducting YBa₂Cu₃O_7−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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引用

Leiderer, P., Boneberg, J., Brüll, P., Bujok, V., & Herminghaus, S. (1993). Nucleation and growth of a flux instability in superconducting YBa₂Cu₃O_7−x films. Physical Review Letters, 71(16), 2646-2649. doi:10.1103/PhysRevLett.71.2646.

引用: https://hdl.handle.net/11858/00-001M-0000-0029-B5F9-2

要旨

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.