The self-field loss on AC transport current for in situ PIT processed MgB2 superconducting tapes with carbides addition and the carbon steel sheath

T. Ohzawa; Nozomu Nanato; S. B. Kim; S. Murase; D. Miyagi; N. Takahashi; Y. Yamada; A. Nitta; K. Tachikawa

doi:10.1016/j.physc.2007.04.266

The self-field loss on AC transport current for in situ PIT processed MgB₂ superconducting tapes with carbides addition and the carbon steel sheath

T. Ohzawa, Nozomu Nanato, S. B. Kim, S. Murase, D. Miyagi, N. Takahashi, Y. Yamada, A. Nitta, K. Tachikawa

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The new in situ MgB₂ tapes with/without SiC addition and the hot pressing process have been fabricated using the carbon steel sheath. The critical temperature (T_c), critical current density (J_c) and the AC transport current loss of those tapes have been studied and discussed in various conditions. The MgB₂ tapes with the carbon steel sheath that improved the core hardness and homogeneity, resulting in high J_c, and the SiC addition, and the hot pressing brought narrow T_c transition width. As the carbon steel has ferromagnetism, it affected the loss of the MgB₂ tape. The large losses that were two to three orders of magnitude higher than Norris' theoretical curve were obtained. It was clarified that the main loss of the MgB₂ tape was the hysteresis loss of the carbon steel sheath.

Original language	English
Pages (from-to)	798-801
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	463-465
Issue number	SUPPL.
DOIs	https://doi.org/10.1016/j.physc.2007.04.266
Publication status	Published - Oct 1 2007

Keywords

AC loss
Carbon steel sheath
MgB superconductor
Nano-SiC
Self-field loss

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2007.04.266

Cite this

Ohzawa, T., Nanato, N., Kim, S. B., Murase, S., Miyagi, D., Takahashi, N., Yamada, Y., Nitta, A., & Tachikawa, K. (2007). The self-field loss on AC transport current for in situ PIT processed MgB₂ superconducting tapes with carbides addition and the carbon steel sheath. Physica C: Superconductivity and its applications, 463-465(SUPPL.), 798-801. https://doi.org/10.1016/j.physc.2007.04.266

Ohzawa, T, Nanato, N, Kim, SB, Murase, S, Miyagi, D, Takahashi, N, Yamada, Y, Nitta, A & Tachikawa, K 2007, 'The self-field loss on AC transport current for in situ PIT processed MgB₂ superconducting tapes with carbides addition and the carbon steel sheath', Physica C: Superconductivity and its applications, vol. 463-465, no. SUPPL., pp. 798-801. https://doi.org/10.1016/j.physc.2007.04.266

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title = "The self-field loss on AC transport current for in situ PIT processed MgB2 superconducting tapes with carbides addition and the carbon steel sheath",

abstract = "The new in situ MgB2 tapes with/without SiC addition and the hot pressing process have been fabricated using the carbon steel sheath. The critical temperature (Tc), critical current density (Jc) and the AC transport current loss of those tapes have been studied and discussed in various conditions. The MgB2 tapes with the carbon steel sheath that improved the core hardness and homogeneity, resulting in high Jc, and the SiC addition, and the hot pressing brought narrow Tc transition width. As the carbon steel has ferromagnetism, it affected the loss of the MgB2 tape. The large losses that were two to three orders of magnitude higher than Norris' theoretical curve were obtained. It was clarified that the main loss of the MgB2 tape was the hysteresis loss of the carbon steel sheath.",

keywords = "AC loss, Carbon steel sheath, MgB superconductor, Nano-SiC, Self-field loss",

author = "T. Ohzawa and Nozomu Nanato and Kim, {S. B.} and S. Murase and D. Miyagi and N. Takahashi and Y. Yamada and A. Nitta and K. Tachikawa",

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AU - Ohzawa, T.

AU - Nanato, Nozomu

AU - Kim, S. B.

AU - Murase, S.

AU - Miyagi, D.

AU - Takahashi, N.

AU - Yamada, Y.

AU - Nitta, A.

AU - Tachikawa, K.

PY - 2007/10/1

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N2 - The new in situ MgB2 tapes with/without SiC addition and the hot pressing process have been fabricated using the carbon steel sheath. The critical temperature (Tc), critical current density (Jc) and the AC transport current loss of those tapes have been studied and discussed in various conditions. The MgB2 tapes with the carbon steel sheath that improved the core hardness and homogeneity, resulting in high Jc, and the SiC addition, and the hot pressing brought narrow Tc transition width. As the carbon steel has ferromagnetism, it affected the loss of the MgB2 tape. The large losses that were two to three orders of magnitude higher than Norris' theoretical curve were obtained. It was clarified that the main loss of the MgB2 tape was the hysteresis loss of the carbon steel sheath.

AB - The new in situ MgB2 tapes with/without SiC addition and the hot pressing process have been fabricated using the carbon steel sheath. The critical temperature (Tc), critical current density (Jc) and the AC transport current loss of those tapes have been studied and discussed in various conditions. The MgB2 tapes with the carbon steel sheath that improved the core hardness and homogeneity, resulting in high Jc, and the SiC addition, and the hot pressing brought narrow Tc transition width. As the carbon steel has ferromagnetism, it affected the loss of the MgB2 tape. The large losses that were two to three orders of magnitude higher than Norris' theoretical curve were obtained. It was clarified that the main loss of the MgB2 tape was the hysteresis loss of the carbon steel sheath.

KW - AC loss

KW - Carbon steel sheath

KW - MgB superconductor

KW - Nano-SiC

KW - Self-field loss

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