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Advances in Condensed Matter Physics
Volume 2013 (2013), Article ID 821073, 5 pages
http://dx.doi.org/10.1155/2013/821073
Research Article

Electrical Transport Properties of (Bi1.6Pb0.4Sr2Ca2Cu3O10)/Ag Tapes with Different Nanosized MgO

School of Applied Physics, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia

Received 6 July 2013; Revised 4 November 2013; Accepted 4 November 2013

Academic Editor: R. N. P. Choudhary

Copyright © 2013 Nabil A. A. Yahya and R. Abd-Shukor. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

MgO nanopowders with average size 20 and 40 nm were introduced into (Bi1.6Pb0.4Sr2Ca2Cu3O10)(MgO)x (  wt.%) in the pellet form. The optimum amounts for the highest transport critical current density were and 0.01 wt.% for 20 and 40 nm MgO, respectively. These results were used to fabricate MgO added (Bi, Pb)-2223/Ag sheathed tapes using the powder-in-tube method. The tapes were sintered at 845°C for 50 h and 100 h. The structure, microstructure, and of the tapes were determined. The temperature and magnetic field dependence of for the MgO added tapes exhibited a significant enhancement compared with the nonadded tapes. of 20 nm MgO added tape was higher compared with the 40 nm MgO added tape. A higher was obtained when the tapes were sintered for 100 h. The increase in can be explained as the increase of the flux pinning strength by nanosized MgO. The nanoparticle with size closer to the coherence length was more effective in enhancing .