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磁場侵入長
Wikipedia definition
1. London penetration depthIn superconductors, the London penetration depth (usually denoted as or) characterizes the distance to which a magnetic field penetrates into a superconductor and becomes equal to 1/e times that of the magnetic field at the surface of the superconductor. Typical values of λL range from 50 to 500 nm. The London penetration depth results from considering the London equation and Ampère's circuital law.
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