Figure 2
From: Large rectification magnetoresistance in nonmagnetic Al/Ge/Al heterojunctions

Current amplitude and frequency dependence of the rectification magnetoresistance.
(a) The current amplitude dependence of the rectification MR (marked as RMR) of the Al/Ge/Al heterojunctions in the circle configuration measured at 20 K for the fixed frequency 1000 Hz. As comparison, the conventional MR (marked as DC-MR) was shown, which was measured by using DC with the same current amplitude as AC. (b) The frequency dependence of the rectification MR for another similar Al/Ge/Al heterojunction in the circle configuration measured at 300 K under AC current of 10 μA.