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CRITICAL CURRENT OF HIGH-CRITICAL TEMPERATURE CERAMICS.

Author(s) : DMITRIEV V. M., HRISTENKO E. V., PRIHOD'KO O. R.

Type of article: Article

Summary

CRITICAL CURRENTS ARE MEASURED ON SAMPLES OF THE HIGH-CRITICAL-TEMPERATURE SUPERCONDUCTING COMPOUND TLCA(2)BA(3)CU(4) O(Y) IN THE TEMPERATURE RANGE 4. 2 K TO CRITICAL TEMPERATURE AND WITH AN EXTERNAL MAGNETIC FIELD UP TO 1.3 T. THE RESULTS OBTAINED ARE INTERPRETED WITHIN THE MODEL TREATING OF A CERAMIC SAMPLE AS A SET OF SUPERCONDUCTING GRAINS ELECTRICALLY COUPLED THROUGH JOSEPHSON WEAK LINKS, WHOSE SIZES OBEY THE NORMAL DISTRIBUTION LAW. IT IS SHOWN THAT THE DEPENDENCES OF CRITICAL CURRENTS ON THE MAGNETIC FIELD STRENGTH IN CERAMICS ARE DETERMINED MAINLY BY THE CHARACTERISTICS OF WEAK LINKS OF VARIOUS SIZES, BY THE AVAILABILITY OF STRUCTURAL FLUCTUATIONS, AND BY NON-UNIFORM CURRENT DISTRIBUTION OVER THE LINK SECTIONS.

Details

  • Original title: CRITICAL CURRENT OF HIGH-CRITICAL TEMPERATURE CERAMICS.
  • Record ID : 1991-1960
  • Languages: English
  • Source: Fiz. nizk. Temp. - vol. 16 - n. 6
  • Publication date: 1990
  • Document available for consultation in the library of the IIR headquarters only.

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