| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1664454 | Thin Solid Films | 2016 | 6 Pages |
•We study transport properties of La0.7Sr0.3MnO3 thin films on SrTiO3.•Films thinner than 15 nm show a strongly non-linear behavior for 300 nm bridges.•Non-linearities are not visible for 1 μm bridges for the same thickness.•We infer that local removal of oxygen from bridges causes this non-linearity.
We investigate thin films of La0.7Sr0.3MnO3 grown on SrTiO3 in which bridges of 100 μm long and 1 μm or 300 nm wide (distance between voltage contacts was 25 μm) were defined lithographically. In bridges of 1 μm, we find the current–voltage characteristics to be perfectly linear (ohmic) over the full temperature range between 400 K and 10 K. Strong non-linearities however are observed for a 300 nm wide bridge in the temperature regime below the transition temperature. The non-linearities are present even when applying a high magnetic field of 9 T.
