Non-linear polaronic conduction in magnetite nanowires

Pooja Singh*, P. K. Rout, Sudhir Husale, Anurag Gupta, Manju Singh, R. K. Rakshit, Anjana Dogra

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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

Original languageEnglish
Pages (from-to)566-571
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
StatePublished - 1 Dec 2016
Externally publishedYes


  • Focused ion beam
  • Magnetite nanowire
  • Pulsed laser deposition


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