Investigation of flux jumps during pulsed field magnetization in graphene-Added MgB2 bulks

K. Yokoyama, T. Oka, K. Berger, R. Dorget, M. Koblischka, M. Grigoroscuta, M. Burdusel, D. Batalu, G. Aldica, P. Badica, N. Sakai, M. Muralidhar, M. Murakami

Research output: Contribution to journalConference article

Abstract

MgB2 bulk superconductors are expected to be utilized as rare-earth-free and lightweight trapped field magnets. However, the flux jumps frequently happen during the magnetizing processes, and heavily degrade the field-Trapping performances. We have investigated the effect of additives to the MgB2 bulk samples prepared by spark plasma sintering process, and observed various flux jumps during the pulsed field magnetizing processes, which were carried out at 14 K which was obtained by the 2-stage GM cryocooler. The authors classified the flux motions as three categories as "no flux flow", "fast flux flow", and "flux jump" regions, and investigated the conditions where the flux jumps happen. We observed some drastic flux jumps in the pristine and clarified the effect of graphene addition to the flux jumps. The experimental results showed us a possible expansion of no flux jump region, and suggested us the improvement of field trapping capability.

Original languageEnglish
Article number012080
JournalJournal of Physics: Conference Series
Volume1559
Issue number1
DOIs
Publication statusPublished - 2020 Jun 19
Event14th European Conference on Applied Superconductivity, EUCAS 2019 - Glasgow, United Kingdom
Duration: 2019 Sep 12019 Sep 5

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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