Figure 7
Transport properties of ultrathin LCMO film before and after application of nanodots [[75]]. (a) Resistivity behavior for 20-nm ultrathin film of La0.7Ca0.3MnO3 showing insulating behavior and no clear metal-insulator transition. (b) Resistivity data of the same film after applying Fe nanodots to surface showing a recovery to bulk-like behavior with an MIT temperature of 255 K at 0 T (note change in scale). (c) Ferromagnetic Fe nanodots drive a huge change in the film’s resistivity compared to the diamagnetic Cu nanodots. Insets: AFM images of typical nanodot coverages for Cu and Fe systems on LCMO films. (d) Magnetoresistive behavior shows a much higher magnetic response in the spin coupled system.