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D. A. Cardwell IRC in Superconductivity, University of Cambridge Madingley Road, Cambridge, CB3 0HE, UK

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N. Hari Babu IRC in Superconductivity, University of Cambridge Madingley Road, Cambridge, CB3 0HE, UK

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K. Iida IRC in Superconductivity, University of Cambridge Madingley Road, Cambridge, CB3 0HE, UK

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Nano-composite (RE)-Ba-Cu-O bulk superconductors containing non-superconducting phase inclusions of composition RE 2 Ba 4 CuMO y (the '2411' phase), where M = W, Nb, Ag and Bi, embedded in the REBa 2 Cu 3 O 7-d (RE-123) superconducting matrix have been fabricated successfully. The 2411-phase has typical dimensions in the range 10-300 nm and is stable under the substitution of any rare earth element on the Y site for all M elements. The 2411-phase is paramagnetic in nature and is characterized by a double perovskite cubic crystallographic structure. All phases within the (RE)-2411 family are chemically inert within the RE-123 matrix and do not coarsen appreciably at elevated temperatures during processing. Most significantly, the (RE)-2411 phase forms effective flux pinning sites within the superconducting matrix, since their size is comparable to that of the coherence length of RE-Ba-Cu-O. A direct correlation between the RE 2 Ba 4 CuMO y phase inclusions content in the RE-123 matrix and increased magnetic flux pinning has been observed. The flux pinning force and the current densities increase by an order of magnitude for the nano-composites compared to that of bulk, melt processed RE-Ba-Cu-O without inclusions, confirming their potential for improved current carrying performance when processed in the form of bulk, thin-film or coated conductors.

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Senior editors

Editor-in-Chief: Kukovecz Ákos (SZTE)

Editor-in-Chief: Kónya Zoltán (SZTE)

 

Nanopages
Publication Model Gold Open Access
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Subscription Information Gold Open Access

Nanopages
Language English
Size B5
Year of
Foundation
2006
Volumes
per Year
1
Issues
per Year
1
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1787-4033 (Print)
ISSN 1788-0718 (Online)

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