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Vortex phases in YBa2Cu3Oy (y=6.5) for B parallel to CuO: impact of regular and random pinning arrays

Record type: Article

Using high angular resolution (up to 10-4 degree) resistive measurements we studied a YBa2Cu3O6.5 single crystal for the magnetic field (B<28 T) direction closely parallel (within the lock-in angle of 0.3°) to the crystal CuO-planes. Our data show that the vortices become confined between the CuO-planes below a well-defined temperature Tcf. Using a pseudo-flux transformer geometry for electrical transport measurements we demonstrate directly a smectic-like vortex movement for temperatures below TS. Our measurements reveal a rich phase diagram for magnetic field orientation BCuO, originating from the inter-play between pinning by the CuO-planes, point-like disorder from oxygen vacancies and temperature fluctuations. Commensurability between the inter-vortex distance and the CuO-layer period causes a pronounced oscillatory behaviour dominated by in-plane vortex movement.

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Citation

Zhukov, A.A., Filby, E.T., de Groot, P.A.J., Kupfer, H., Wolf, T., Jansen, A.G.M. and Mossang, E. (2004) Vortex phases in YBa2Cu3Oy (y=6.5) for B parallel to CuO: impact of regular and random pinning arrays Physica C: Superconductivity And its Applications, 404, (1-4), pp. 450-454. (doi:10.1016/j.physc.2003.11.022).

More information

Published date: 1 May 2004

Identifiers

Local EPrints ID: 57635
URI: http://eprints.soton.ac.uk/id/eprint/57635
ISSN: 0921-4534
PURE UUID: 590d20de-511c-4e24-8479-1a3b4d5c18de

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Date deposited: 13 Aug 2008
Last modified: 25 Jul 2017 16:31

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Contributors

Author: A.A. Zhukov
Author: E.T. Filby
Author: P.A.J. de Groot
Author: H. Kupfer
Author: T. Wolf
Author: A.G.M. Jansen
Author: E. Mossang

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