Non-linear polaronic conduction in magnetite nanowires

We report the temperature dependent current (I) – voltage (V) characteristics of Fe3O4 nanowires with varying width (w) of 132, 358, and 709nm. While the widest nanowire (w=709nm) shows ohmic I (V) curves for all temperatures, those for w=132 and 358nm show nonlinearity, which can be expressed by a...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2016-12, Vol.419, p.566-571
Main Authors: Singh, Pooja, Rout, P.K., Husale, Sudhir, Gupta, Anurag, Singh, Manju, Rakshit, R.K., Dogra, Anjana
Format: Article
Language:English
Subjects:
Focused ion beam
Magnetite nanowire
Pulsed laser deposition
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report the temperature dependent current (I) – voltage (V) characteristics of Fe3O4 nanowires with varying width (w) of 132, 358, and 709nm. While the widest nanowire (w=709nm) shows ohmic I (V) curves for all temperatures, those for w=132 and 358nm 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. •Temperature dependent I–V measurements of FIB fabricated magnetite nanowires.•Small polaron based conduction in non-linear I–V curves.•Anomalously large hopping lengths due to percolation effect and/or antiphase domains.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2016.06.085