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Flux pinning and vortex dynamics in high-critical temperature superconducting films.

Author(s) : PROKHOROV V. G., KAMINSKIJ G. G., PETRUKHNO Ja. A., KASATKIN A. L., KUZNECOV M. A., PAN V. M.

Type of article: Article

Summary

It is shown that the flux line pinning in polycrystalline YBCO films occurs due to anisotropy of the superconducting parameters in the case of strong misorientation of adjacent grains and that it is connected with local suppression of the order parameter for smaller misorientation angles. Peculiarities of the resistive state in magnetic fields have led the authors to suppose that vortex motion occurs preferably along the grain boundaries, which form a network of so-called easy slip channels. Such microstructural features of the tested films lead to the double-peak behaviour of the dissipative part of the alternating-current susceptibility.

Details

  • Original title: Flux pinning and vortex dynamics in high-critical temperature superconducting films.
  • Record ID : 1994-0030
  • Languages: English
  • Source: Cryogenics - vol. 33 - n. 5
  • Publication date: 1993/05

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