Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8155008 | Journal of Magnetism and Magnetic Materials | 2016 | 6 Pages |
Abstract
We report the temperature dependent current (I) - voltage (V) characteristics of Fe3O4 nanowires with varying width (w) of 132, 358, and 709Â nm. While the widest nanowire (w=709Â nm) shows ohmic I (V) curves for all temperatures, those for w=132 and 358Â nm show nonlinearity, which can be expressed by a combination of linear (V) and cubic (V3) terms. The behaviour of conductance (linear bias component of current) and non-linearity in these nanowires is related to small polaron hopping related conduction. Moreover, we observed an anomalously large hopping lengths, which may be related to the size of percolation cluster and/or antiphase domain. Our study presents first experimental evidence for such non-linear polaronic conduction in magnetite nanowires.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Pooja Singh, P.K. Rout, Sudhir Husale, Anurag Gupta, Manju Singh, R.K. Rakshit, Anjana Dogra,