Change of the electrical properties in Fe-Al2O3 granular films

Boff, M. A. S.; Teixeira, S. R.; Schmidt, J. E.; Antunes, A. B.
August 2004
Applied Physics Letters;8/2/2004, Vol. 85 Issue 5, p757
Academic Journal
A systematic study of the electrical resistance as a function of the temperature was performed in Fe-Al2O3 granular thin films. Our findings revealed a nonlinear dependence of the current versus voltage in the low field regime at low temperature. The variable range hopping mechanism is the best description of the behavior of our samples. A change of the electronic properties can be observed depending on the direct current applied to the sample’s plane, and is related to different localization lengths.


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