Coherent Vortex Motion in Superconducting Nanobridges Based on YBaCuO Thin Films

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Pedyash, M.V. and Gerritsma, G.J. and Blank, D.H.A. and Rogalla, H. (1995) Coherent Vortex Motion in Superconducting Nanobridges Based on YBaCuO Thin Films. IEEE Transactions on Applied Superconductivity, 5 (2). pp. 1387-1390. ISSN 1051-8223

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Abstract:Submicron bridges in superconducting YBaCuO thin films with typical linear dimensions of about 100 nm have been fabricated. Experimental current-voltage characteristics of these structures are in reasonable agreement with numerical simulations based on true two dimensional viscous vortex motion and indicate the effect of switching from a single path motion at low transport currents to multiple paths at higher currents. The value of the viscous drag coefficient of this vortex motion is found to be about 10/sup -9/ kg/m.sec, which is about two orders of magnitude lower than one estimated from the Bardeen-Stephen model. Critical current densities in the investigated nanobridges are up to 5.10/sup 10/ A/m/sup 2/ at T=4.2 K. The critical current as a function of the width of the bridges indicates the dominating role of edge pinning.
Item Type:Article
Copyright:© 1995 IEEE
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/24231
Official URL:http://dx.doi.org/10.1109/77.402823
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