論文

2006年7月

Direct relationship between trapped magnetic flux characteristics and percolation transition temperature in a practical sized bulk high-temperature superconductor

SUPERCONDUCTOR SCIENCE & TECHNOLOGY
  • Y. Ogama
  • ,
  • T. Nakamura

19
7
開始ページ
S455
終了ページ
S460
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1088/0953-2048/19/7/S07
出版者・発行元
IOP PUBLISHING LTD

The trapped magnetic flux characteristics of a Gd-system bulk high-T-c superconductor (HTS) near the so-called percolation transition temperature was investigated experimentally. The percolation transition temperature was directly determined from the temperature dependence of the E-J characteristics with a bar-shaped HTS. Next, the disc-shaped bulk HTS sample was magnetized by means of a field-cooling process, and then the decay of the trapped magnetic flux density was monitored for 30 min after the exciting current of the electromagnet was cut off. It was shown that the decay rate of trapped magnetic flux changed considerably around the percolation transition temperature. Furthermore, the trapped flux showed stepwise decay, and these phenomena could explain the percolation mechanism of the depinning process. From our study, the percolation temperature may be utilized for the limit parameter in order to design application systems with a practical sized bulk HTS.


リンク情報
DOI
https://doi.org/10.1088/0953-2048/19/7/S07
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000239025500008&DestApp=WOS_CPL
ID情報
  • DOI : 10.1088/0953-2048/19/7/S07
  • ISSN : 0953-2048
  • Web of Science ID : WOS:000239025500008

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