Investigation of dislocation mobilities in germanium in the low-temperature range by in situ straining experiments

F. Louchet, D. Cochet Muchy, Y. Brechet, J. Pelissier

Research output: Contribution to journalArticleResearchpeer-review

39 Citations (Scopus)


The mobility of screw and 60° dislocations in thin, single-crystal foils of germanium has been studied by in situ tensile testing in a high-voltage electron microscope operating at 400 kV, at stresses around 40 MPa and temperatures around 400°C. The velocity of the dislocations was found to depend strongly on their length, and this is discussed in terms of a double-kink mechanism with a high lattice friction on kinks. Activation energies for kink formation and migration are deduced from fits of the velocity–length curves, and discussed in terms of core structures of partial dislocations.

Original languageEnglish
Pages (from-to)327-335
Number of pages9
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Issue number2
Publication statusPublished - Feb 1988
Externally publishedYes

Cite this