Plane-Wave Sound Radiation from Mobile Dislocation Walls

Abstract

Thin walls of mobile dislocations have been produced. When stimulated by a plane ultransonic wave, the cylindrical waves radiated from each dislocation are all in phase and produce a plane radiated wave. As each dislocation contributes in the same way, the detected macroscopic plane wave directly measures the microscopic motion of individual dislocations. Radiation-induced pinning-point changes and orientation effects are evidence that the signal comes from moving and not from static dislocations.