Magneto-optical imaging of magnetic flux patterns in superconducting films with antidots
V. V. Yurchenko, R. Woerdenweber, Yu. M. Galperin, D. V. Shantsev, J. I. Vestgaarden, T. H. Johansen
Abstract
Superconducting YBaCuO thin films were equipped with a special arrangement of antidots (holes) of 1 micron radius in order to guide the stream of magnetic flux moving in (or out of) the sample. The flux distribution and its dynamics were visualized using real-time magneto-optical imaging. It is clearly demonstrated that one-dimensional antidot arrays strongly facilitate propagation of magnetic flux. We also demonstrate a possibility to alter the direction of flux motion in a controlled way by special arrangement of intercepting antidot arrays. Our resolution was sufficient for observation of flux in particular antidots, which allows a more detailed dynamic analysis of such systems.
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