Study of the barrier against flux exit from type II superconductors
作者： M.A.R. LeBlanc , G. Fillion , W.E. Timms , A. Zahradnitsky , J.R. Cave
DOI: 10.1016/0011-2275(81)90071-0
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摘要: Abstract The expulsion of flux from flat samples (ribbons and discs) Nb, NbTa, V PbIn cooling, Tc to 4.2 K, in static magnetic fields, H o , has been investigated. A dramatic increase the component threading specimen parallel its faces is observed when tilted pierce these broad surfaces. We attribute this phenomenon extinction a surface barrier against exit by H⊥, transverse . effect B⊥ = μoH⊥ on profiles also examined. concept equilibrium diamagnetism applied novel situation. simple picture, incorporating prevailing views, developed. With although crude approximations are used computations, we reproduce several families data curves quite well. seen be an appreciable fraction Hc1 information variation with tilt angle obtained.
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