ZnO is one of the very promising diluted magnetic semiconductors (DMSs) for spintronics applications, with many groups reporting room temperature ferromagnetism.Many groups have studied the electrical properties of ZnO-based nanostructures;however, the results differ significantly.Moreover, there are only a very small number of experimental results reported on ZnO dilute magnetic semiconductor nanostructures.It is only very recently that electrical and magnetotransport measurements were performed on single Co-doped ZnO dilute magnetic semiconductor nanowires.