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Mesoscopic transport in thin films of La0.67Sr0.33MnO3

Publication date: Available online 4 December 2015
Source:Thin Solid Films
Author(s): I.M. Dildar, D.B. Boltje, M.B.S. Hesselberth, J. Aarts
We investigate thin films of La0.7Sr0.3MnO3 grown on SrTiO3 in which bridges of 100 μm long and 1 μm or 300nm 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 400K and 10K. Strong non-linearities however are observed for a 300nm wide bridge in the temperature regime below the transition temperature. The non-linearities are present even when applying a high magnetic field of 9T.


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