Jogs and kinks

Jog describes the turns of a dislocation line inside a crystal structure. A dislocation line is rarely uniformly straight as in the figure, often containing many curves and/or steps to facilitate movement through the crystal in incremental amounts, rather than shifting the entire line at once. One of these step types is a jog, the other is a kink. However, both are typically referred to as jogs, which can be a source of confusion. Segments of dislocation line that have a component of their sense vector normal to the glide plane are termed jogs.[1] See image for the definitions of the sense vector and the glide plane. Segments of dislocation line that do not leave the original glide plane are termed kinks. Jogs are often very immobile compared to kinks, and require diffusion of crystallographic defects like vacancies or interstitial atoms to climb. They are not capable of glide (movement in the glide plane) because the direction of motion is in the plane normal direction, not on the plane itself as with kinks.Jog describes the turns of a dislocation line inside a crystal lattice Segments of dislocation line that have a component of their sense vector normal to the glide plane are termed jogs In most crystals and under most circumstances there is no such thing as a straight dislocation. Real dislocations contain kinks and jogs - sudden deviations from a straight line on atomic dimensions.They owe their existence first of all to the fact that dislocations always "live" in a crystals - in a periodic arrangement of atoms.Kinks may be produced by several mechanisms, in particular they may be formed by the movement of the dislocation.let s look at kinks. For that we first have to consider the concept of the Peierls potential of a dislocation.