TY - JOUR
T1 - Investigation of flux jumps during pulsed field magnetization in graphene-Added MgB2 bulks
AU - Yokoyama, K.
AU - Oka, T.
AU - Berger, K.
AU - Dorget, R.
AU - Koblischka, M.
AU - Grigoroscuta, M.
AU - Burdusel, M.
AU - Batalu, D.
AU - Aldica, G.
AU - Badica, P.
AU - Sakai, N.
AU - Muralidhar, M.
AU - Murakami, M.
N1 - Funding Information:
Romanian team acknowledges MCI-UEFISCDI, grant POC 37_697 no. 28/01.09.2016 REBMAT and Core Program 2018/2019.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2020/6/19
Y1 - 2020/6/19
N2 - 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.
AB - 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.
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U2 - 10.1088/1742-6596/1559/1/012080
DO - 10.1088/1742-6596/1559/1/012080
M3 - Conference article
AN - SCOPUS:85088131586
SN - 1742-6588
VL - 1559
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012080
T2 - 14th European Conference on Applied Superconductivity, EUCAS 2019
Y2 - 1 September 2019 through 5 September 2019
ER -