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ACTIVATION PARAMETERS OF THE LOW-TEMPERATURE PEAK OF INTERNAL FRICTION IN YBCO CERAMICS.

[In Russian. / En russe.]

Author(s) : NACIK V. D.

Type of article: Article

Summary

TEMPERATURE DEPENDENCIES OF VELOCITY AND ABSORPTION COEFFICIENT OF LONGITUDINAL ULTRASOUND WITH 2 FREQUENCIES ARE MEASURED BETWEEN 6 AND 300 K. HYSTERESIS OF SOUND VELOCITY UNDER THERMAL CYCLING AND SERIES OF ABSORPTION PEAKS ARE RECORDED. THE SOUND FREQUENCY-DEPENDENTBEHAVIOUR OF THE PEAK LOCALIZED IN THE HYSTERESIS REGION IS ANALYSED. AN ASSUMPTION IS MADE ON THE RELATION OF THIS PEAK TO A THERMALLY ACTIVATED STRUCTURAL PROCESS, AND THE ACTIVATION PARAMETERS OF SUCH A PROCESS ARE ESTIMATED.

Details

  • Original title: [In Russian. / En russe.]
  • Record ID : 1990-2248
  • Languages: Russian
  • Source: Fiz. nizk. Temp. - vol. 15 - n. 8
  • Publication date: 1989
  • Document available for consultation in the library of the IIR headquarters only.

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