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

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

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Vortex phases in YBa₂Cu₃O_y (y=6.5) for B parallel to CuO: impact of regular and random pinning arrays

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Jansen, A. G. M.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Mossang, E.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Zhukov, A. A., Filby, E. T., de Groot, P. A. J., Kupfer, H., Wolf, T., Jansen, A. G. M., et al. (2004). Vortex phases in YBa₂Cu₃O_y (y=6.5) for B parallel to CuO: impact of regular and random pinning arrays. Physica C, 404(1-4), 450-454.

Cite as: https://hdl.handle.net/21.11116/0000-000E-F73F-6

Abstract

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 0.3degrees) to the crystal CuO-planes. Our data show that the
vortices become confined between the CuO-planes below a well-defined
temperature T-cf. Using a pseudo-flux transformer geometry for
electrical transport measurements we demonstrate directly a
smectic-like vortex movement for temperatures below T-S. Our
measurements reveal a rich phase diagram for magnetic field orientation
Bparallel toCuO, 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. (C) 2004 Elsevier B.V. All
rights reserved.