Imaging of vortex flow in microstructured high-Tc films by laser scanning microscope

We studied the YBa2Cu3O7 thin films with arrays of antidots by imaging the resistive photoresponse with a laser scanning microscope. The films were initially covered by a thin Au layer, which we removed in order to improve the spatial resolution and imaging contrast. This procedure did not change th...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2008-04, Vol.468 (7-10), p.552-556
Main Authors: Lukashenko, A., Wördenweber, R., Ustinov, A.V.
Format: Article
Language:English
Subjects:
Antidots
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cuprates superconductors (high tc and insulating parent compounds)
Exact sciences and technology
Flux flow
Laser scanning microscopy
Physics
Superconductivity
Vortices
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Description
Summary:We studied the YBa2Cu3O7 thin films with arrays of antidots by imaging the resistive photoresponse with a laser scanning microscope. The films were initially covered by a thin Au layer, which we removed in order to improve the spatial resolution and imaging contrast. This procedure did not change the superconducting properties of the samples. The improved spatial resolution allowed for visualizing the individual flow channels of vortices. The reported measurements with the laser scanning microscope feature direct measurements of the local critical currents of the samples. We show that minor variations of the bias current leave the spatial distribution of vortex flow channels unchanged.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2007.11.020