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摘要: Experiments on the penetration of a magnetic field (de Haas and Casimir-Jonker 1934) into superconductors have shown that, when superconducting cylinder is placed in an increasing transverse field, first occurs applied strength reaches value 0·50 Hk , where critical corresponding to temperature experiment. Since, for this strength, at surface (von Laue 1932) it intersected by diametral plane perpendicular direction will be precisely above result accordance with expectation. On other hand, was found de Haas, Voogd Jonker (1934) that under same conditions exhibited electrical resistance reached 0·58 . Since discrepancy probably results from properties “intermediate state” (Peierls 1936; London Landau 1937) occurring just begins penetrate superconductor, seemed desirable investigate matter more detail.