淡江大學機構典藏:Item 987654321/27804
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 63993/96712 (66%)
造訪人次 : 3595698      線上人數 : 272
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/27804


    題名: Measuring voltage in a YBa2Cu3O8 superconductor induced by a moving magnet
    作者: Chan, W. C.;Lin, C. B.;Chao, H.;Chiang, C. H.
    貢獻者: 淡江大學物理學系
    日期: 2005-11
    上傳時間: 2013-07-09 15:16:11 (UTC+8)
    出版者: College Park: American Physical Society
    摘要: This study examined a pair of permanent magnets rotating above a tape-shaped single grain YBa2Cu3O8 (YBCO) superconducting sample (SS) with and without an applied bias current. The root-mean-square voltages (Vrms) induced by the forced movements of the vortices inside the SS were measured. At SS temperatures higher than the critical temperature (Tc) , the induced Vrms was a constant, as expected from Faraday’s law. However, at a temperature in the superconducting transition region, the induced Vrms is a sensitive function of both the motion of the magnet and the bias current applied to the SS. At temperatures below the transition region, the induced Vrms
    did not drop to zero immediately. Instead, it dropped only to a particular value and then decreased as the temperature decreased. The experimental results obtained at temperatures in the superconducting transition region can be understood by considering the superposition of the two induced voltages. One is induced according to Faraday’s law, and the other one is induced by the flux flow inside the SS, which is caused by the bias current. At temperatures below the transition region, an explanation of how the magnetic field of a moving magnet passes through the superconductor is provided, and is consistent qualitatively with the experimental results. In this explanation, some of the magnetic field is assumed first to fill in and then to be pulled out from all sides of the SS in accordance with Bean’s model as the moving magnet passes through the SS from above.
    關聯: Physical Review B (Condensed Matter and Materials Physics) 72(17), 172510(4pages)
    DOI: 10.1103/PhysRevB.72.172510
    顯示於類別:[物理學系暨研究所] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    1098-0121_72(17)p172510(4pages).pdf233KbAdobe PDF424檢視/開啟
    index.html0KbHTML300檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋