Switching characteristics of MgB2 wires subjected to transient application of magnetic field

Kohei Higashikawa, T. Nakamura, K. Osamura, M. Takahashi, M. Okada

研究成果: ジャーナルへの寄稿Conference article

2 引用 (Scopus)

抄録

We investigated current transport properties in MgB2 wires subjected to transient application of magnetic field, and then discussed their applicability to magnetically controlled switching elements. These wires were fabricated by powder-in-tube (PIT) technique, and Cu-Ni as well as stainless was utilized for their sheath material. A short sample of the wire was installed in a Gifford-McMahon (GM) cryocooler, and was impregnated with solid nitrogen for the sake of thermal stabilization. After stabilizing the temperature of the sample at a certain bias current, the voltage and the temperature in between potential taps were monitored with a transient application of magnetic field. Such measurements were repeated systematically as functions of bias current, operating temperature and magnetic field intensity. It was shown that the sample quickly generated resistance without temperature increment by applying the transient and weak magnetic field. This indicates the applicability of MgB 2 wires to persistent current switches (PCS) with quick response.

元の言語英語
ページ(範囲)1261-1266
ページ数6
ジャーナルPhysica C: Superconductivity and its Applications
426-431
発行部数II
DOI
出版物ステータス出版済み - 10 7 2005
外部発表Yes
イベントProceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity -
継続期間: 11 23 200411 25 2004

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wire
Wire
Magnetic fields
Bias currents
magnetic fields
solid nitrogen
switching circuits
taps
operating temperature
sheaths
Powders
Transport properties
Temperature
temperature
magnetic flux
Temperature distribution
temperature distribution
Nitrogen
switches
Stabilization

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

これを引用

Switching characteristics of MgB2 wires subjected to transient application of magnetic field. / Higashikawa, Kohei; Nakamura, T.; Osamura, K.; Takahashi, M.; Okada, M.

:: Physica C: Superconductivity and its Applications, 巻 426-431, 番号 II, 07.10.2005, p. 1261-1266.

研究成果: ジャーナルへの寄稿Conference article

Higashikawa, Kohei ; Nakamura, T. ; Osamura, K. ; Takahashi, M. ; Okada, M. / Switching characteristics of MgB2 wires subjected to transient application of magnetic field. :: Physica C: Superconductivity and its Applications. 2005 ; 巻 426-431, 番号 II. pp. 1261-1266.
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AB - We investigated current transport properties in MgB2 wires subjected to transient application of magnetic field, and then discussed their applicability to magnetically controlled switching elements. These wires were fabricated by powder-in-tube (PIT) technique, and Cu-Ni as well as stainless was utilized for their sheath material. A short sample of the wire was installed in a Gifford-McMahon (GM) cryocooler, and was impregnated with solid nitrogen for the sake of thermal stabilization. After stabilizing the temperature of the sample at a certain bias current, the voltage and the temperature in between potential taps were monitored with a transient application of magnetic field. Such measurements were repeated systematically as functions of bias current, operating temperature and magnetic field intensity. It was shown that the sample quickly generated resistance without temperature increment by applying the transient and weak magnetic field. This indicates the applicability of MgB 2 wires to persistent current switches (PCS) with quick response.

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