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    題名: Induced Voltage Measurements on a YBa2Cu3O7−δ Superconducting Thin Film Due to a Pair of Rotating Magnets
    作者: Chiang, C. H.;Li, Y. H.;陳偉正;Chan, W. C.;Wang, L. M.;Lin, J. G.
    貢獻者: 淡江大學物理學系
    關鍵詞: Moving magnetic field;Induced voltage;Vortex;Superconducting thin film;Superconductor
    日期: 2007-07
    上傳時間: 2009-12-31 10:31:35 (UTC+8)
    出版者: Springer
    摘要: In this study, the induced voltages due to the rotation of a pair of magnets on an YBCO superconducting thin film sample (SS) with and without bias current were measured. It was found that the induced root mean square voltage (Vrms) was a constant (V0) at temperatures higher than the critical temperature (Tc) of the SS, as expected from Faraday’s law. 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. These results can be understood by considering the superposition of the two kinds of induced voltages. One is induced according to Faraday’s law, and the other one is induced by the vortex movements inside the SS which is caused by the bias current. At temperatures below the transition region, the induced Vrms had a value equal to V0 and remained unchanged as the temperature further decreased. An explanation based on the distribution of the magnetic flux inside the SS was given, and it was concluded that the superconductor-normal conductor loop acted like a normal-normal conductor loop to the moving magnetic fields in this low temperature region.
    關聯: Journal of Superconductivity and Novel Magnetism 20(5), pp.369-371
    DOI: 10.1007/s10948-007-0231-x
    顯示於類別:[物理學系暨研究所] 期刊論文

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