Pulsed Field Magnetization of GdBaCuO Superconducting Bulks With High Magnetization Efficiency Using a Split-Type Coil With Soft Iron Yoke
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Publication Date
2022Journal Title
IEEE Transactions on Applied Superconductivity
ISSN
1051-8223
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Type
Article
This Version
AM
Metadata
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Shinden, M., Namburi, D., Takahashi, K., Fujishiro, H., & Ainslie, M. (2022). Pulsed Field Magnetization of GdBaCuO Superconducting Bulks With High Magnetization Efficiency Using a Split-Type Coil With Soft Iron Yoke. IEEE Transactions on Applied Superconductivity https://doi.org/10.1109/TASC.2022.3167340
Abstract
Pulsed field magnetization (PFM) and field-cooled magnetization (FCM) have been carried out for GdBaCuO disk-shaped bulks fabricated by two-step buffer-assisted (BA)-top seeded infiltration growth (TSIG) technique, and the results are compared with those of bulks fabricated by conventional top seeded melt growth (TSMG) technique. In both PFM and FCM experiments, the two-step BA-TSIG bulks showed higher trapped field properties than the TSMG bulks and, in particular, the maximum trapped field by PFM was over 3.5 T at 40 K using a split-type coil with soft iron yokes. The magnetization efficiency, BTmax/Bapp*, was defined to evaluate the trapped field efficiency quantitatively, where BTmax is the maximum trapped field and Bapp* is the optimum applied field to achieve BTmax at each operating temperature. A high efficiency
over 80% was achieved for the two-step BA-TSIG bulks at 40 K, which was nearly 10% higher than that for the TSMG bulks. These results were due to the high critical current density, Jc, and the thinness of the two-step BA-TSIG bulks, readily causing flux jumps to assist in achieving higher trapped fields.
Sponsorship
JSPS KAKENHI Grant No. 19K05240;
Adaptable and Seamless Technology transfer Program through Target-driven R&D (A-STEP), Japan Science and Technology Agency (JST), Grant Nos. VP30218088419, JPMJTM20AK;
EPSRC Early Career Fellowship, EP/P020313/1
Funder references
Engineering and Physical Sciences Research Council (EP/P020313/1)
Identifiers
External DOI: https://doi.org/10.1109/TASC.2022.3167340
This record's URL: https://www.repository.cam.ac.uk/handle/1810/336006
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