CUED Publications database

A trapped field of 17.6 T in melt-processed, bulk Gd-Ba-Cu-O reinforced with shrink-fit steel

Durrell, JH and Dennis, AR and Jaroszynski, J and Ainslie, MD and Palmer, KGB and Shi, YH and Campbell, AM and Hull, J and Strasik, M and Hellstrom, EE and Cardwell, DA (2014) A trapped field of 17.6 T in melt-processed, bulk Gd-Ba-Cu-O reinforced with shrink-fit steel. Superconductor Science and Technology, 27. ISSN 0953-2048

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The ability of large-grain (RE)Ba2Cu3O7-δ ((RE)BCO; RE = rare earth) bulk superconductors to trap magnetic fields is determined by their critical current. With high trapped fields, however, bulk samples are subject to a relatively large Lorentz force, and their performance is limited primarily by their tensile strength. Consequently, sample reinforcement is the key to performance improvement in these technologically important materials. In this work, we report a trapped field of 17.6 T, the largest reported to date, in a stack of two silver-doped GdBCO superconducting bulk samples, each 25 mm in diameter, fabricated by top-seeded melt growth and reinforced with shrink-fit stainless steel. This sample preparation technique has the advantage of being relatively straightforward and inexpensive to implement, and offers the prospect of easy access to portable, high magnetic fields without any requirement for a sustaining current source. © 2014 IOP Publishing Ltd.

Item Type: Article
Uncontrolled Keywords: bulk superconductor critical current high magnetic field top-seeded melt growth
Divisions: Div C > Materials Engineering
Depositing User: Unnamed user with email
Date Deposited: 16 Jul 2015 13:26
Last Modified: 02 Sep 2015 21:12
DOI: 10.1088/0953-2048/27/8/082001