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THERMAL CONDUCTIVITY OF POLYCRYSTAL YBCO IN THE RANGE 2-300 K.

Author(s) : MERISOV B. A.

Type of article: Article

Summary

THE PHONON THERMAL CONDUCTIVITY OF THIS POLYCRYSTALLINE HIGH-CRITICAL TEMPERATURE SUPERCONDUCTOR WAS STUDIED IN THE RANGE 2-300 K. THE MAIN CONTRIBUTION TO THE PHONON SCATTERING IS MADE BY PROCESSES IN THE CRYSTALLINE GRAINS BULK AND THE INTERPARTICLE BOUNDARIES PLAY THE SECOND ROLE. THE PHONON HEAT CONDUCTIVITY MAXIMUM IS NOT CONNECTED WITH THE ELECTRON INFLUENCE. THE THERMAL CONDUCTIVITY TEMPERATURE DEPENDENCE IS CONNECTED WITH SCATTERING OF < PLAIN > AND < BULK > PHONONS ON TWIN BOUNDARIES AT LOW TEMPERATURES. THE EVIDENCES OF SAMPLE CRYSTAL LATTICE INSTABILITY IS OBSERVED IN THE REGION OF SUPERCONDUCTING TRANSITION.

Details

  • Original title: THERMAL CONDUCTIVITY OF POLYCRYSTAL YBCO IN THE RANGE 2-300 K.
  • Record ID : 1991-2410
  • Languages: English
  • Source: Fiz. nizk. Temp. - vol. 16 - n. 5
  • Publication date: 1990
  • Document available for consultation in the library of the IIR headquarters only.

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