Lindhard’s paradox—Diffusion of magnetic field into a perfect conductor
| Autor: | A. B. Pippard |
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| Rok vydání: | 1990 |
| Předmět: | |
| Zdroj: | American Journal of Physics. 58:1147-1152 |
| ISSN: | 1943-2909 0002-9505 |
| Popis: | This paper develops the argument, presented briefly by Lindhard in 1953, that a perfectly conducting metallic sample is unable to keep out a steady magnetic field, since even in the absence of collisions the field energy can still be reduced by transfer to the electron assembly. For a plane slab the analysis, which is given in detail, is an extension of the theory of the anomalous skin effect, and the ineffectiveness concept plays the same role in elucidating the physical mechanism. In samples of other shapes, interaction with the field may not be so narrowly confined to a small fraction of effective electrons, but it is suggested that the diffusion of magnetic field nevertheless proceeds at a rate that is usually rather indifferent to shape. |
| Databáze: | OpenAIRE |
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