Internal Friction in Germanium at Low Temperatures.

Abstract

The internal friction of germanium crystals having various dislocation densities in the range of 1000/sq. cm. to about 10 to the 7th power/sq. cm. was measured in the low KHz frequency range from 80K to 473K and in the MHz frequency range at 300K. No evidence for a dislocation contribution to the internal friction was obtained. The internal friction was amplitude independent and could be accounted for by thermoelastic damping. The results were independent of the doping levels of the germanium crystals and of their orientations. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1971
Accession Number
AD0734108

Entities

People

  • Howard K. Birnbaum
  • Richard F. Mattas
  • William L. Haworth

Organizations

  • University of Illinois Urbana–Champaign

Tags

DTIC Thesaurus Topics

  • Amplitude
  • Dislocations
  • Frequency
  • Friction
  • Germanium
  • Internal Friction
  • Low Temperature
  • Orientation (Direction)

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Semiconductor Device Technology
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).