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Vortex flow in granular aluminum films

Abstract

The vortex flow and the resistive transition of granular Al films have been measured as a function of the magnetic field perpendicular to the film surface. The effects of fluctuations of the superconducting order parameter on the vortex flow resistanceR f are discussed and compared with the theory of Maki and Takayama. The depression ofR f belowH c2 has been observed together with an electric field dependence ofR f. The depression ofR f is shown to agree qualitatively with the theoretical prediction. The field dependence ofR f appears to be related to that of the excess conductivity aboveH c2.

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Ogushi, T., Rinderer, L. Vortex flow in granular aluminum films. J Low Temp Phys 13, 349–363 (1973). https://doi.org/10.1007/BF00654073

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Keywords

  • Aluminum
  • Magnetic Field
  • Vortex
  • Depression
  • Magnetic Material