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
Abstract
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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