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THERMAL CONDUCTIVITY AND CRITICAL CURRENT DENSITY IN HIGH CRITICAL TEMPERATURE LANTHANUM-DOPED YBCO SUPERCONDUCTORS.

Author(s) : NOTO K.

Type of article: Article

Summary

TEMPERATURE DEPENDENCES OF CRITICAL CURRENT DENSITY AND THERMA L CONDUCTIVITY HAVE BEEN STUDIED IN SEVERAL HIGH CRITICAL TEMPERATURE OXIDE SUPERCONDUCTORS (1-2-3 COMPOUNDS). A CRITICAL CURRENT REVERSING PHENOMENON, IN WHICH CRITICAL CURRENT AT 4.2 K IS SMALLER THAN AT 77 K, WAS OBSERVED IN SOME OF THEM. THE SMALLER CRITICAL CURRENT CAN BE EXPLAINED BY THE SMALLERQUENCH CURRENT DENSITY EXPECTED FROM THE VERY SMALL THERMAL CONDUCTIVITY OBSERVED IN THESE MATERIALS. THERMAL CONDUCTIVITY TURNED OUT TO BE DOMINATED BY THE PHONON CONTRIBUTION.

Details

  • Original title: THERMAL CONDUCTIVITY AND CRITICAL CURRENT DENSITY IN HIGH CRITICAL TEMPERATURE LANTHANUM-DOPED YBCO SUPERCONDUCTORS.
  • Record ID : 1991-0523
  • Languages: English
  • Source: Cryogenics - vol. 29 - n. 6
  • Publication date: 1989

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