Nano Archive

Increased flux pinning in YBa 2 Cu 3 O 7−δ thin-film devices through embedding of Au nano crystals

Katzer, C. and Schmidt, M. and Michalowski, P. and Kuhwald, D. and Schmidl, F. and Grosse, V. and Treiber, S. and Stahl, C. and J.Albrecht, and Hübner, U. and Undisz, A. and Rettenmayr, M. and Schütz, G. and Seidel, P. (2011) Increased flux pinning in YBa 2 Cu 3 O 7−δ thin-film devices through embedding of Au nano crystals. EPL (Europhysics Letters), 95 (6). p. 68005.

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Official URL: http://stacks.iop.org/0295-5075/95/i=6/a=68005

Abstract

We prepared direct-current superconducting quantum interference device (dc-SQUID) gradiometers consisting of a single YBa 2 Cu 3 O 7- δ (YBCO) layer on SrTiO 3 (STO) bicrystal substrates. The superconducting thin film was modified by embedding crystalline gold nanoparticles. We investigated the growth conditions of these particles as well as their influence on the properties of the YBCO thin film. In our magneto-optical measurements we found that the presence of embedded nano crystals results in a distinct enhancement of j c over the whole investigated temperature range. We attribute the higher critical current density to an increased pinning, which also results in a reduction of the flux noise of our investigated gradiometers.

Item Type:Article
ID Code:11135
Deposited By:Prof. Alexey Ivanov
Deposited On:01 Nov 2011 23:23
Last Modified:02 Nov 2011 00:47

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