Interplay of bulk and interface effects in the electric-field-driven transition in magnetite

A. A. Fursina, R. G S Sofin, I. V. Shvets, D. Natelson

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Contact effects in devices incorporating strongly correlated electronic materials are comparatively unexplored. We have investigated the electrically driven phase transition in magnetite (100) thin films by four-terminal methods. In the lateral configuration, the channel length is less than 2μm, and voltage-probe wires ∼100nm in width are directly patterned within the channel. Multilead measurements quantitatively separate the contributions of each electrode interface and the magnetite channel. We demonstrate that on the onset of the transition contact resistances at both source and drain electrodes and the resistance of magnetite channel decrease abruptly. Temperature-dependent electrical measurements below the Verwey temperature indicate thermally activated transport over the charge gap. The behavior of the magnetite system at a transition point is consistent with a theoretically predicted transition mechanism of charge gap closure by electric field.

Original languageEnglish
Article number045123
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number4
DOIs
Publication statusPublished - Jan 25 2010

Fingerprint

Ferrosoferric Oxide
Magnetite
magnetite
Electric fields
electric fields
Electrodes
electrodes
Contact resistance
transition points
contact resistance
electrical measurement
closures
Phase transitions
wire
Wire
Thin films
Temperature
temperature
probes
Electric potential

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Interplay of bulk and interface effects in the electric-field-driven transition in magnetite. / Fursina, A. A.; Sofin, R. G S; Shvets, I. V.; Natelson, D.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 81, No. 4, 045123, 25.01.2010.

Research output: Contribution to journalArticle

@article{90dfbcacbb4b4bfca9ae63743f00e37d,
title = "Interplay of bulk and interface effects in the electric-field-driven transition in magnetite",
abstract = "Contact effects in devices incorporating strongly correlated electronic materials are comparatively unexplored. We have investigated the electrically driven phase transition in magnetite (100) thin films by four-terminal methods. In the lateral configuration, the channel length is less than 2μm, and voltage-probe wires ∼100nm in width are directly patterned within the channel. Multilead measurements quantitatively separate the contributions of each electrode interface and the magnetite channel. We demonstrate that on the onset of the transition contact resistances at both source and drain electrodes and the resistance of magnetite channel decrease abruptly. Temperature-dependent electrical measurements below the Verwey temperature indicate thermally activated transport over the charge gap. The behavior of the magnetite system at a transition point is consistent with a theoretically predicted transition mechanism of charge gap closure by electric field.",
author = "Fursina, {A. A.} and Sofin, {R. G S} and Shvets, {I. V.} and D. Natelson",
year = "2010",
month = "1",
day = "25",
doi = "10.1103/PhysRevB.81.045123",
language = "English",
volume = "81",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "4",

}

TY - JOUR

T1 - Interplay of bulk and interface effects in the electric-field-driven transition in magnetite

AU - Fursina, A. A.

AU - Sofin, R. G S

AU - Shvets, I. V.

AU - Natelson, D.

PY - 2010/1/25

Y1 - 2010/1/25

N2 - Contact effects in devices incorporating strongly correlated electronic materials are comparatively unexplored. We have investigated the electrically driven phase transition in magnetite (100) thin films by four-terminal methods. In the lateral configuration, the channel length is less than 2μm, and voltage-probe wires ∼100nm in width are directly patterned within the channel. Multilead measurements quantitatively separate the contributions of each electrode interface and the magnetite channel. We demonstrate that on the onset of the transition contact resistances at both source and drain electrodes and the resistance of magnetite channel decrease abruptly. Temperature-dependent electrical measurements below the Verwey temperature indicate thermally activated transport over the charge gap. The behavior of the magnetite system at a transition point is consistent with a theoretically predicted transition mechanism of charge gap closure by electric field.

AB - Contact effects in devices incorporating strongly correlated electronic materials are comparatively unexplored. We have investigated the electrically driven phase transition in magnetite (100) thin films by four-terminal methods. In the lateral configuration, the channel length is less than 2μm, and voltage-probe wires ∼100nm in width are directly patterned within the channel. Multilead measurements quantitatively separate the contributions of each electrode interface and the magnetite channel. We demonstrate that on the onset of the transition contact resistances at both source and drain electrodes and the resistance of magnetite channel decrease abruptly. Temperature-dependent electrical measurements below the Verwey temperature indicate thermally activated transport over the charge gap. The behavior of the magnetite system at a transition point is consistent with a theoretically predicted transition mechanism of charge gap closure by electric field.

UR - http://www.scopus.com/inward/record.url?scp=77954827091&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954827091&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.81.045123

DO - 10.1103/PhysRevB.81.045123

M3 - Article

VL - 81

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 4

M1 - 045123

ER -