Local domain sensing with nanostructured tunneling anisotropic magneto resistance probes

Abstract

Miniaturizing a tunneling anisotropic magneto resistance contact allows local sensing of the density of states of (Ga,Mn)As. This offers the possibility to locally read-out magnetization states in nanoscale devices without the need to add disruptive metal contacts. Using this technique, we show that the behavior of (Ga,Mn)As at a sub micron scale is closer to that of an ideal macrospin than is the case for macroscopic (Ga,Mn)As layers.