Influence of Artificial Defects on Trapped Field Performance in a Superconducting Bulk Magnet

K. Yokoyama, K. Eranda, Y. Zhao, A. Katsuki, A. Miura, T. Oka

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


In this study, we attempt to improve the trapped magnetic field by pulsed-field magnetization using REBCO bulk with small holes processed artificially. In our previous study, a hole was opened in the growth sector region (GSR) in accordance with the idea that the performance of the growth sector boundary (GSB) was not reduced because the critical current density of the GSB was higher than that of the GSR. In the next study, a small hole was processed on the GSB to decrease the magnetic shield toward the magnetic flux that entered through the GSB. The experimental results suggested that placing a hole on the GSB was advantageous to trapped field performance as compared with placing a hole at the GSR. In this paper, three more holes were processed in the bulk with a single hole on the GSB, and trapped field performance was investigated. Although the performance was decreased overall in the bulk with four holes, we confirmed that the peak value of total magnetic flux shifted to the low applied magnetic field, although the maximum value was almost the same as that of the bulk with a single hole.

Original languageEnglish
Article number012050
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2017 Jul 26
Externally publishedYes
Event29th International Symposium on Superconductivity, ISS 2016 - Tokyo, Japan
Duration: 2016 Dec 132016 Dec 15

ASJC Scopus subject areas

  • General Physics and Astronomy


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