Brunel University Research Archive (BURA) >
Special Research Institutes >
Brunel Centre for Advanced Solidification Technology (BCAST) >

Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/1997

Title: Bulk superconducting nano-composites with high critical currents
Authors: Hari Babu, N
Iida, K
Briffa, A
Shi, Y
Cardwell, DA
Keywords: Flux pinning
High temperature superconductors
Melt-textured superconductors
Nano-composites
Publication Date: 2007
Publisher: IEEE
Citation: IEEE Trans Applied Superconductivity, 17: 2953
Abstract: Flux pinning sites are most effective if their size is comparable to the superconducting coherence length, which is on the nano-meter scale for RE-Ba-Cu-O superconductors [RE = rare earth element]. Introducing nano-phase inclusions directly into the bulk superconducting material has only been partially successful to date, however, due primarily to the absence of chemically stable phases that can co-exist with RE-Ba-Cu-O without suppressing its key superconducting properties. We have identified novel isostructural phases based on (RE)2Ba4CuMOy (where M = W, Zr, Nb, Ag and Bi) and have fabricated successfully superconducting bulk nano-composites with a high current carrying capability. The average size of the nano-inclusions is observed to vary from 20 nm to 300 nm depending on element M. An observed improvement in Jc under low and high external magnetic fields at 77 K correlates directly with an increased density of nano-inclusions in the superconducting matrix.
URI: http://bura.brunel.ac.uk/handle/2438/1997
DOI: http://dx.doi.org/10.1109/TASC.2007.898223
ISSN: 1051-8223
Appears in Collections:Materials Engineering
Brunel Centre for Advanced Solidification Technology (BCAST)

Files in This Item:

File Description SizeFormat
Bulk Superconducting Nano-Composites With High Critical Currents.pdf1.33 MBAdobe PDFView/Open

Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.

 


Library (c) Brunel University.    Powered By: DSpace
Send us your
Feedback. Last Updated: September 14, 2010.
Managed by:
Hassan Bhuiyan