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Longitudinal Magnetic Field Effect in Superconductors

机译:超导体中的纵向磁场效应

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摘要

Characteristic electromagnetic phenomena called longitudinal magnetic field effect are observed for a current-carrying superconductor in a parallel magnetic field. These phenomena and the mechanism of the longitudinal magnetic field effect are generally discussed from the viewpoint of flux motion in this article. This effect includes a significant enhancement of the critical current density from that in the transverse magnetic field, a deviation from Josephson's relation E = B x v for the induced electric field (B and v are the magnetic flux density and the velocity of flux lines), negative electric field in the resistive state, etc. These are attributed to the force-free torque to reduce the rotational shear in flux lines that appears in the force-free configuration and the resultant rotational flux motion. This is analogous to the electromagnetic phenomena in the transverse magnetic field in which the Lorentz force causes the flux motion. The similarity and difference of electromagnetic phenomena are discussed between the transverse and longitudinal magnetic field configurations.
机译:对于平行磁场中的载流超导体,观察到称为纵向磁场效应的特征电磁现象。本文从磁通运动的角度对这些现象和纵向磁场效应的机理进行了一般性的讨论。这种影响包括临界电流密度相对于横向磁场的显着提高,感应电场与约瑟夫森关系E = B xv的偏差(B和v是磁通密度和磁通线速度),这归因于无力转矩,以减少在无力状态下出现的磁通线中的旋转剪切力以及由此产生的旋转磁通运动。这类似于横向磁场中的电磁现象,其中洛伦兹力引起磁通运动。讨论了横向和纵向磁场配置之间电磁现象的相似性和差异。

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  • 来源
    《Japanese journal of applied physics》 |2012年第1issue1期|p.010111.1-010111.8|共8页
  • 作者

    Teruo Matsushita;

  • 作者单位

    Department of Computer Science and Electronics, Kyushu Institute of Technology, lizuka, Fukuoka 820-8502, Japan;

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  • 正文语种 eng
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