Velocities of Individual Dislocations in Germanium

DOI PDF 3 Citations
  • J. R. Patel
    Bell Telephone Laboratories, Murray Hill, New Jersey 07974
  • P. E. Freeland
    Bell Telephone Laboratories, Murray Hill, New Jersey 07974

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<jats:p>Dislocation velocities have been measured on loops whose Burgers vectors have been determined by x-ray topography. The new measurements do not agree with earlier work; the reasons for the discrepancy are discussed. The earlier work was also in error because of an incorrect assumption about the Burgers vector of the dislocations. The measured velocity-stress behavior falls into two distinct stress regimes. At low stresses the dislocation velocity depends more strongly on stress than in the high-stress region. The activation energy for dislocation motion depends on stress and varies from 2.9 to 1.5 eV over the stress range 0.6–8 kg/mm2.</jats:p>

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