Trapped field over 4 tesla on GdBaCuO bulk by pulse field method and magnetizing mechanism

Hiroyuki Fujishiro; Masahiko Kaneyama; Tatsuya Tateiwa; Tetsuo Oka

doi:10.1088/1742-6596/43/1/101

Trapped field over 4 tesla on GdBaCuO bulk by pulse field method and magnetizing mechanism

Hiroyuki Fujishiro, Masahiko Kaneyama, Tatsuya Tateiwa, Tetsuo Oka

Department of Materials Science and Engineering

Research output: Contribution to journal › Article

6 Citations (Scopus)

Abstract

We report a new pulse field magnetizing (PFM) method using the modified multi pulse technique combined with a stepwise cooling (MMPSC) to obtain the trapped field B_T^P over 4 T on a bulk superconductor. The B_T^P value as high as 4.47 T has been attained on the surface of the GdBaCuO bulk, which is the present highest using PFM. The key points to obtain the higher B_T^P are the introduction of a small amount magnetic flux (B_T^P∼1 T) into the bulk with the M-shaped trapped field distribution at a higher starting temperature T_s∼45 K, and the following application of the optimum stronger pulse fields of B_ex∼6.7 T at a lower T_s∼30 K. The reduction in the temperature rise ΔT due to the already existing trapped flux is a very important issue.

Original language	English
Article number	101
Pages (from-to)	405-408
Number of pages	4
Journal	Journal of Physics: Conference Series
Volume	43
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/43/1/101
Publication status	Published - 2006 Jun 1

ASJC Scopus subject areas

Physics and Astronomy(all)

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Fujishiro, H., Kaneyama, M., Tateiwa, T., & Oka, T. (2006). Trapped field over 4 tesla on GdBaCuO bulk by pulse field method and magnetizing mechanism. Journal of Physics: Conference Series, 43(1), 405-408. [101]. https://doi.org/10.1088/1742-6596/43/1/101

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abstract = "We report a new pulse field magnetizing (PFM) method using the modified multi pulse technique combined with a stepwise cooling (MMPSC) to obtain the trapped field BTP over 4 T on a bulk superconductor. The BTP value as high as 4.47 T has been attained on the surface of the GdBaCuO bulk, which is the present highest using PFM. The key points to obtain the higher BTP are the introduction of a small amount magnetic flux (BTP∼1 T) into the bulk with the M-shaped trapped field distribution at a higher starting temperature Ts∼45 K, and the following application of the optimum stronger pulse fields of Bex∼6.7 T at a lower Ts∼30 K. The reduction in the temperature rise ΔT due to the already existing trapped flux is a very important issue.",

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AU - Oka, Tetsuo

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