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FLUX CREEP AND CRITICAL CURRENTS IN EPITAXIAL HIGH CRITICAL TEMPERATURE FILMS.

Author(s) : GRIESSEN R.

Type of article: Article

Summary

THE PURPOSE OF THE PAPER IS TO DISCUSS SOME OF THE DIFFICULTIES ENCOUNTERED IN MEASUREMENTS OF MAGNETIZATION RELAXATION EFFECTS IN HIGH CRITICAL TEMPERATURE SUPERCONDUCTORS: 1) HOW INFORMATION ABOUT THE ENERGY BARRIERS FOR FLUX MOTION MAY BE EXTRACTED FROM EXPERIMENTAL DATA IS DISCUSSED AND EXPERIMENTAL EVIDENCE IS GIVEN FOR THE NECESSITY TO INTRODUCE A DISTRIBUTION OF ACTIVATION ENERGIES TO REPRODUCE THE OBSERVED TEMPERATURE DEPENDENCE OF THE RELAXATION RATE ; 2) BY MEANS OF MONTE CARLOSIMULATIONS, THE INFLUENCE OF AN INITIAL PARTIALLY CRITICAL STATE ON THE TIME DEPENDENCE OF THE MAGNETIZATION RELAXATION IS STUDIED. THE RESULTS ARE COMPARED WITH THE PREDICTIONS OF AN ANALYTICAL TREATMENT ; AND 3) IT IS SHOWN THAT THE INITIAL CONDITIONS HAVE A CRUCIAL INFLUENCE ON THE MAGNETIZATION RELAXATION.

Details

  • Original title: FLUX CREEP AND CRITICAL CURRENTS IN EPITAXIAL HIGH CRITICAL TEMPERATURE FILMS.
  • Record ID : 1991-1949
  • Languages: English
  • Source: Cryogenics - vol. 30 - n. 7
  • Publication date: 1990

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