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ST185 - Critical Current Density in Ag/YBa2Cu3Ox and PrBa2Cu3Oy/YBa2Cu3Ox Multilayers

Critical Current Density in Ag/YBa2Cu3Ox and PrBa2Cu3Oy/YBa2Cu3Ox Multilayers

V. S. Dang1,*, P. Mikheenko1, A. Sarkar1, J. S. Abell1 and A. Crisan1,2

1School of Metallurgy and Materials, University of Birmingham,
Birmingham B15- 2TT , United Kingdom.
2National Institute of Materials Physics, Bucharest 077125, Romania

*Corresponding Author e-mail: [email protected]

ABSTRACT - One of successful methods of introducing artificial pinning centres in superconducting films is by alternating layers of superconducting material and incomplete layers (planar distributions of nanodots) of other materials (quasi-superlattice or quasi-multilayer approach). Most of the work on artificial pinning centres has been done on thin YBa2Cu3Ox (YBCO) films and a large variety of quasi-multilayer materials have been explored. It is still difficult to justify the choice of a quasi-multilayer material for particular superconducting applications. One of the properties to be taken into account is compatibility of the crystal lattice of YBCO and the quasi-superlattice material. Here we compare the superconducting behaviour of two very different quasi-multilayers: one with very similar crystal lattices of nanodots and YBCO: PrBa2Cu3Oy (PBCO)/YBCO, and another one with very different, Ag/YBCO.  We found that the difference between crystal lattices strongly affects superconducting properties of quasi-multilayers and leads to different types of pinning in the films.

Published in Journal of Physics Conf. Series (SuST234, 012010 (2010)