CUED Publications database

Magnetization of bulk superconductors using thermally actuated magnetic waves

Li, Q and Yan, Y and Rawlings, C and Coombs, T (2010) Magnetization of bulk superconductors using thermally actuated magnetic waves. IEEE Transactions on Applied Superconductivity, 20. pp. 2243-2247. ISSN 1051-8223

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Abstract

A novel technique is proposed to magnetize bulk superconductors, which has the potential to build up strong superconducting magnets. Instead of conventionally using strong magnetic pulses, periodical magnetic waves with strength as low as that of rare-earth magnets are applied. These magnetic waves travel from the periphery to the center of a bulk superconductor and become trapped little by little. In this way, bulk superconductors can gradually be magnetized. To generate these magnetic waves, a thermally actuated magnet was developed, which is constructed by a heating/cooling switch system, a rare-earth bulk magnet, and a Gadolinium (Gd) bulk. The heating/cooling switch system controls the temperature of the Gd bulk, which, along with the rare-earth magnet underneath, can transform thermal signals into magnetic waves. The modeling results of the thermally actuated magnet show that periodical magnetic waves can effectively be generated by applying heating and cooling pulses in turn. A YBCO bulk was tested in liquid nitrogen under the magnetic waves, and a notable accumulation of magnetic flux density was observed. © 2006 IEEE.

Item Type: Article
Uncontrolled Keywords: Bulk superconductor Gadolinium (Gd) Magnetize Rare-earth magnet Thermally actuated magnet
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:29
Last Modified: 08 Dec 2014 02:31
DOI: 10.1109/TASC.2010.2046414