Determination of the core radius in a cylindrical tin single crystal in the intermediate state upon the destruction of the superconductivity by a current
V. A. FrolovPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Khar’kovYa. S. KanPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Khar’kov
ABI
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The core radius in single crystal tin samples (R3.7/R300 ≈ 10−5) in the intermediate state has been determined by measuring the magnetic flux produced in the samples by a longitudinal magnetic field that did not give rise to the paramagnetic effect. The results do not contradict the assumption made in the London model that the s-domain boundaries are rounded off as a result of the positive surface energy of the n-s boundaries.
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