Internal Friction in Deformed Indium Antimonide Crystals(Physics)

The internal friction in deformed InSb single crystals is investigated in the temperature range from 4.2 to 503 K. Three relaxation peaks, denoted by P_1, P_2, and P_3, with activation energies of (0.05±0.01), (0.08±0.01), and (0.36±0.02) eV, respectively, are observed to develop upon deformation. The heights of these peaks decrease gradually upon annealing. Peaks P_1 and P_2 are interpreted to be associated with the stress-induced motion of geometrical kinds on In-dislocations and Sb-dislocations, respectively, passing over the Peierls potential barrier of the second kind. Peak P_3 is interpreted to be due to the interaction of geometrical kinks with jogs located on dislocation lines