Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/9009
Title: Synthesis of YBa2Cu3O(7-δ) and Y2BaCuO5 nanocrystalline powders for YBCO superconductors using carbon nanotube templates
Authors: Shi, Y
Hasan, T
Babu, NH
Torrisi, F
Milana, S
Ferrari, AC
Cardwell, DA
Keywords: Superconductivity;Flux pinning;Nanotubes;Trapped field
Issue Date: 2012
Publisher: ACS Publications
Citation: ACS Nano, 6(6), 5395 - 5403, 2012
Abstract: We fabricate nanosized superconducting YBa(2)Cu(3)O(7-δ) (Y-123) and nonsuperconducting Y(2)BaCuO(5) (Y-211) powders using carbon nanotubes as template. The mean particle size of Y-123 and Y-211 is 12 and 30 nm, respectively. The superconducting transition temperature of the Y-123 nanopowder is 90.9 K, similar to that of commercial, micrometer-scale powders fabricated by conventional processing. The elimination of carbon and the formation of a high purity superconducting phase both on the micro- and macroscale is confirmed by Raman spectroscopy and X-ray diffraction. We also demonstrate improvement in the superconducting properties of YBCO single grain bulk samples fabricated using the nanosize Y-211 powder, both in terms of trapped field and critical current density. The former reaches 553 mT at 77 K, with a ∼20% improvement compared to samples fabricated from commercial powders. Thus, our processing method is an effective source of pinning centers in single grain superconductors.
Description: This is the author's accepted manuscript. The final published article is available from the link below. Copyright © 2012 American Chemical Society.
URI: http://pubs.acs.org/doi/abs/10.1021/nn301262t
http://bura.brunel.ac.uk/handle/2438/9009
DOI: http://dx.doi.org/10.1021/nn301262t
ISSN: 1936-086X
Appears in Collections:Mechanical and Aerospace Engineering
Dept of Mechanical and Aerospace Engineering Research Papers

Files in This Item:
File Description SizeFormat 
Fulltext.pdf2.2 MBAdobe PDFView/Open


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