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This chapter covers magnetic phenomena inside and outside a superconductorSuperconductor, in which the magnetic flux densityMagnetic flux density is zero. As a result, there is no currentCurrent inside the superconductorSuperconductor, and the superconductorSuperconductor is at equivector potential. When a currentCurrent is applied to the superconductorSuperconductor, it flows only on the superconductorSuperconductor surface in such a way that zero magnetic flux densityMagnetic flux density is attained inside. The same thing occurs when an external magnetic flux densityMagnetic flux density is applied to the superconductorSuperconductor. The magnetic flux densityMagnetic flux density is directed parallel to the surface of the superconductorSuperconductor. A special method, i.e., the method of imagesMethod of images, is introduced to determine the magnetic flux densityMagnetic flux density outside the superconductorSuperconductor and the distribution of currentCurrent on the surface in such given conditions. It is theoretically proved that the electrical resistivityResistivity of the superconductorSuperconductor is zero.

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Superconductors

  • 章节

  • 发表日期：

    2025年

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  • Teruo Matsushita

摘要

This chapter covers magnetic phenomena inside and outside a superconductorSuperconductor, in which the magnetic flux densityMagnetic flux density is zero. As a result, there is no currentCurrent inside the superconductorSuperconductor, and the superconductorSuperconductor is at equivector potential. When a currentCurrent is applied to the superconductorSuperconductor, it flows only on the superconductorSuperconductor surface in such a way that zero magnetic flux densityMagnetic flux density is attained inside. The same thing occurs when an external magnetic flux densityMagnetic flux density is applied to the superconductorSuperconductor. The magnetic flux densityMagnetic flux density is directed parallel to the surface of the superconductorSuperconductor. A special method, i.e., the method of imagesMethod of images, is introduced to determine the magnetic flux densityMagnetic flux density outside the superconductorSuperconductor and the distribution of currentCurrent on the surface in such given conditions. It is theoretically proved that the electrical resistivityResistivity of the superconductorSuperconductor is zero.