Electrically driven phase transition in magnetite nanostructures.

@article{Lee2008ElectricallyDP,
  title={Electrically driven phase transition in magnetite nanostructures.},
  author={SungBae Lee and Alexandra Fursina and J. T. Mayo and Cafer T. Yavuz and Vicki L. Colvin and R. G. Sumesh Sofin and Igor V. Shvets and Douglas Natelson},
  journal={Nature materials},
  year={2008},
  volume={7 2},
  pages={
          130-3
        }
}
Magnetite (Fe3O4), an archetypal transition-metal oxide, has been used for thousands of years, from lodestones in primitive compasses to a candidate material for magnetoelectronic devices. In 1939, Verwey found that bulk magnetite undergoes a transition at TV approximately 120 K from a high-temperature 'bad metal' conducting phase to a low-temperature insulating phase. He suggested that high-temperature conduction is through the fluctuating and correlated valences of the octahedral iron atoms… Expand
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References

SHOWING 1-10 OF 52 REFERENCES
Origin of the Verwey transition in magnetite.
TLDR
Comprehensive x-ray powder diffraction studies were carried out in magnetite in the 80-150 K and 0-12 GPa ranges with a membrane-driven diamond anvil cell and helium as a pressure medium, showing a reversible, cubic to a distorted-cubic, structural transition. Expand
Current switching of resistive states in magnetoresistive manganites
Magnetoresistive devices (based on, for example, magnetic multilayers) exhibit large changes in electrical resistance in response to a magnetic field, which has led to dramatic improvements in theExpand
Metal-insulator transitions
Metal-insulator transitions are accompanied by huge resistivity changes, even over tens of orders of magnitude, and are widely observed in condensed-matter systems. This article presents theExpand
Magnetite, a model system for mixed-valence oxides, does not show charge ordering.
TLDR
It is demonstrated the absence of CO along the c axis with the periodicity of either the cubic lattice q=(001) or the doubled cubic lattices q=001/2, which suggests that the Verwey transition is caused by strong electron-phonon interaction instead of an electronic ordering on the octahedral Fe atoms. Expand
Mechanism of the Verwey transition in magnetite: Jahn-Teller distortion and charge ordering patterns.
  • H. Pinto, S. D. Elliott
  • Chemistry, Medicine
  • Journal of physics. Condensed matter : an Institute of Physics journal
  • 2006
We have performed density functional calculations with on-site Coulomb repulsion corrections of systems that may be involved in the Verwey transition in magnetite (Fe(3)O(4)). We find that the lowestExpand
Infrared and Raman studies of the Verwey transition in magnetite
We present infrared and Raman measurements of magnetite (Fe3O4). This material is known to undergo a metal-insulator and a structural transition (Verwey transition) at T-V = 120 K. The structuralExpand
Hysteretic current–voltage characteristics and resistance switching at a rectifying Ti∕Pr0.7Ca0.3MnO3 interface
We have characterized the vertical transport properties of epitaxial layered structures composed of Pr0.7Ca0.3MnO3(PCMO) sandwiched between SrRuO3(SRO) bottom electrode and several kinds of topExpand
The Verwey transition: a new perspective
This review puts in doubt the classical description of the Verwey (metal?insulator) transition in magnetite on the basis of the wide set of experiments carried out over the last 60 years. WeExpand
Charge-orbital ordering and Verwey transition in magnetite.
TLDR
Local density approximation + Hubbard U (LDA + U) band structure calculations reveal that magnetite (Fe3O4) forms an insulating charge-orbital-ordered state below the Verwey transition temperature, and finds an associated t(2g) orbital ordering on the octahedral Fe2+ sublattice. Expand
Enhancement of the magnetization saturation in magnetite (100) epitaxial films by thermo-chemical treatment
The effect of thermo-chemical treatment on the ease of saturation in a magnetic field of epitaxial magnetite (100) thin films grown on MgO (100) substrates was investigated. It was found that theExpand
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