The magnitude varies periodically as the dislocation moves within the plane.
Peierls stress depends on the size and width of a dislocation and the distance between planes.
Because of this, Peierls stress decreases with increasing distance between atomic planes.
Where: The Peierls stress also relates to the temperature sensitivity of the yield strength of material because it very much depends on both short-range atomic order and atomic bond strength.
As temperature increases, the vibration of atoms increases, and thus both peierls stress and yield strength decrease as a result of weaker atomic bond strength at high temperatures.