The charge on edge dislocations in pure KBr single crystals

Abstract

The charge on moving edge dislocations in pure KBr single crystals has been investigated, using two different vibration methods. The smallest charge detected was about 2% of the maximum that can be accommodated on the edge dislocation. This charge increases at increased vibration amplitudes. Prolonged vibration under constant force conditions reveals a long-term decrease of the dislocation charge, which could be distinguished from an apparent decrease, due to a short-and a long-term decrease of the micro-plastic strain amplitude. The oscillating dislocation probably loses some of its extra charge to the redistributed Debye-Hückel charge cloud.