論文

2004年7月

Annealing effects on structural and superconducting properties of MgB2/Fe wires

MODERN PHYSICS LETTERS B
  • S Balamurugan
  • ,
  • T Nakamura
  • ,
  • K Osamura
  • ,
  • Muta, I
  • ,
  • T Hoshino

18
16
開始ページ
791
終了ページ
802
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1142/S0217984904007323
出版者・発行元
WORLD SCIENTIFIC PUBL CO PTE LTD

We report the results of annealing effects on structural and superconducting properties (T-c and J(c)) of various MgB2/Fe wires that are produced by different conditions. Good quality superconducting MgB2/Fe wires are fabricated by the powder-in-tube (PIT) technique at ambient pressure. XRD data confirms that they are hexagonal MgB2 structure. All the annealed samples show higher T-c values in the range of 34.6-38.4 K with J(c) higher than the as-rolled wire. The annealed samples show significant change in the J(c) values as well as in micro-structural features due to variable sintering temperature. On annealing at 1050degreesC for 10 min, we obtain the best quality sample with a J(c) of 37.2 kA/cm(2) at 33.1 K and self-field with a maximum T-c of 38.4 K. Among the samples annealed at 1050degreesC for 5-20 min, the 20 min sample shows lower J(c). Longer annealing time (at 1050degreesC) reduced J(c), indicating a possible interfacial reaction between the Fe sheath and the MgB2 core.


リンク情報
DOI
https://doi.org/10.1142/S0217984904007323
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000223507700003&DestApp=WOS_CPL
ID情報
  • DOI : 10.1142/S0217984904007323
  • ISSN : 0217-9849
  • eISSN : 1793-6640
  • Web of Science ID : WOS:000223507700003

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