  A (Ga,Mn)As nanoelectromechanical resonator is used to obtain the first
direct measurement of magnetostriction in a dilute magnetic semiconductor.
Field-dependent magnetoelastic stress induces shifts in resonance frequency
that can be discerned with a high resolution electromechanical transduction
scheme. By monitoring the field dependence, the magnetostriction and anisotropy
field constants can be simultaneously mapped over a wide range of temperatures.
These results, when compared with theoretical predictions, appear to provide
insight into a unique form of magnetoelastic behavior mediated by holes.
