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Trapped field of 1.1T without flux jumps in an MgB<inf>2</inf> bulk during pulsed field magnetization using a split coil with a soft iron yoke

Fujishiro, H and Mochizuki, H and Ainslie, MD and Naito, T (2016) Trapped field of 1.1T without flux jumps in an MgB<inf>2</inf> bulk during pulsed field magnetization using a split coil with a soft iron yoke. Superconductor Science and Technology, 29.

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Abstract

© 2016 IOP Publishing Ltd Printed in the UK.MgB2 superconducting bulks have promising potential as trapped field magnets. We have achieved a trapped field of Bz = 1.1 T on a high-Jc MgB2 bulk at 13 K without flux jumps by pulsed field magnetization (PFM) using a split-type coil with a soft iron yoke, which is a record-high trapped field by PFM for bulk MgB2 to date. The flux jumps, which frequently took place using a solenoid-type coil during PFM, were avoided by using the split-type coil, and the Bz value was enhanced by the insertion of soft iron yoke. The flux dynamics and heat generation/propagation were analyzed during PFM using a numerical simulation, in which the magnetic flux intruded and attenuated slowly in the bulk and tended to align along the axial direction due to the presence of soft iron yoke. The advantages of the split-type coil and the simultaneous use of a soft iron yoke are discussed.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 18:59
Last Modified: 17 Aug 2017 01:25
DOI: