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Thin Films

  • Rudolf Peter Huebener
Part of the Springer Series in SOLID-STATE SCIENCES book series (SSSOL, volume 6)

Abstract

In Sect.2.3 we have discussed the Landau domain theory which gives a reasonable description of the dimensions of the normal and superconducting domains in the intermediate state of type-I superconductors. According to the result of Landau’s nonbranching model, indicated in (2.40), with decreasing sample thickness the domain width of the intermediate-state structure decreases and the (positive) wall energy contributes more and more to the free energy of the superconductor. Because of this, the critical field perpendicular to a planar superconducting film decreases with decreasing film thickness and would become zero when the film thickness is about equal to the wall energy parameter δ [2.3]. TINKHAM [5.1] was the first to point out that films of type-I superconductors with a thickness less than the coherence length assume an Abrikosov vortex state in a perpendicular magnetic field, similar to the mixed state in type-II superconductors.

Keywords

Flux Tube Critical Field Abrikosov Vortex Perpendicular Magnetic Field Wall Energy 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Rudolf Peter Huebener
    • 1
  1. 1.Physikalisches InstitutLehrstuhl für Experimentalphysik IITübingenGermany

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