Non-linear polaronic conduction in magnetite nanowires

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

doi:10.1016/j.jmmm.2016.06.085

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 journal › Article › peer-review

Abstract

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 language	English
Pages (from-to)	566-571
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	419
DOIs	https://doi.org/10.1016/j.jmmm.2016.06.085
State	Published - 1 Dec 2016
Externally published	Yes

Keywords

Focused ion beam
Magnetite nanowire
Pulsed laser deposition

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10.1016/j.jmmm.2016.06.085

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title = "Non-linear polaronic conduction in magnetite nanowires",

abstract = "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.",

keywords = "Focused ion beam, Magnetite nanowire, Pulsed laser deposition",

author = "Pooja Singh and Rout, {P. K.} and Sudhir Husale and Anurag Gupta and Manju Singh and Rakshit, {R. K.} and Anjana Dogra",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

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doi = "10.1016/j.jmmm.2016.06.085",

language = "אנגלית",

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T1 - Non-linear polaronic conduction in magnetite nanowires

AU - Singh, Pooja

AU - Rout, P. K.

AU - Husale, Sudhir

AU - Gupta, Anurag

AU - Singh, Manju

AU - Rakshit, R. K.

AU - Dogra, Anjana

PY - 2016/12/1

Y1 - 2016/12/1

N2 - 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.

AB - 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.

KW - Focused ion beam

KW - Magnetite nanowire

KW - Pulsed laser deposition

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SN - 0304-8853

VL - 419

SP - 566

EP - 571

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

Non-linear polaronic conduction in magnetite nanowires

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Keywords

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