CUED Publications database

Development of Iron-based Superconducting Bulk Magnet

YAMAMOTO, A and WEISS, J and AINSLIE, M and POLYANSKII, A and LARBALESTIER, D and HELLSTROM, E (2017) Development of Iron-based Superconducting Bulk Magnet. TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan), 52. pp. 397-404. ISSN 0389-2441

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Abstract

This article reviews the recent development of bulk trapped field magnet made with iron-based superconductor (IBSC). A trapped field of over 1 T at 5 K and 0.5 T at 20 K has been measured between a stack of magnetized cylinders of bulk polycrystalline Ba0.6K0.4Fe2As2 superconductors 10 mm in diameter. Magneto-optical imaging revealed a trapped field distribution corresponding to uniform macroscopic current loops circulating through the sample. A standard numerical modelling technique using the measured Jc(B, T) characteristics of a small specimen reproduced the experimentally measured trapped fields well, again indicating the homogeneous current loops in the polycrystalline bulk. Given the untextured polycrystalline nature of the cylinders and their large irreversibility field, it is expected that larger IBSC bulks could trap much higher field.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 14 Dec 2017 01:55
Last Modified: 30 Mar 2021 06:27
DOI: 10.2221/jcsj.52.397