Abstract
IN a previous paper1, I have shown that a body in the so-called 'intermediate' state consists of alternating layers of the supraconducting and normal phases. It can be shown, however, that the plane-parallel form of these layers discussed in this paper does not correspond to a minimum of the free energy*. A detailed investigation leads to the result that the thickness of the layers does not remain constant throughout the body, but is greatest in the inner part, and becomes very small near the surface of the body. The accompanying figure shows a section of a plate in a transverse magnetic field. The normal layers (shaded in the figure) branch in both directions towards the surface of the plate. A similar branching along the lines of force occurs in the intermediate state of a body of any other shape.
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References
Landau, L., Sov. Phys., 11, 130 (1937).
de Haas, Voogd, Jonker, Physica, 1, 281 (1934).
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LANDAU, L. The Intermediate State of Supraconductors. Nature 141, 688 (1938). https://doi.org/10.1038/141688a0
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DOI: https://doi.org/10.1038/141688a0
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