Defect agglomeration in wüstite at high temperatures-II. An electrical conduction model

E. Gartstein; J. B. Cohen; Thomas O Mason

doi:10.1016/0022-3697(86)90005-3

Defect agglomeration in wüstite at high temperatures-II. An electrical conduction model

E. Gartstein, J. B. Cohen, Thomas O Mason

Northwestern University

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

A defect/electrical conduction model based upon a mixture of 5:2 and 13:4 (vacancy-to-tetrahedral) clusters is proposed for FeO which is consistent with available diffraction, nonstoichiometry and electrical data. Conduction occurs via small polaron hopping between Fe³⁺ and Fe²⁺ on octahedral near-cluster sites with two vacancy nearest neighbors. Evidence is cited for an increase in Fe²⁺ on tetrahedral (interstitial) sites as temperature increases.

Original language	English
Pages (from-to)	775-781
Number of pages	7
Journal	Journal of Physics and Chemistry of Solids
Volume	47
Issue number	8
DOIs	https://doi.org/10.1016/0022-3697(86)90005-3
Publication status	Published - 1986

Keywords

clusters
defect clusters
Defects
electrical conductivity
Seebeck coefficient

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/0022-3697(86)90005-3

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Cite this

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AU - Gartstein, E.

AU - Cohen, J. B.

AU - Mason, Thomas O

PY - 1986

Y1 - 1986

N2 - A defect/electrical conduction model based upon a mixture of 5:2 and 13:4 (vacancy-to-tetrahedral) clusters is proposed for FeO which is consistent with available diffraction, nonstoichiometry and electrical data. Conduction occurs via small polaron hopping between Fe3+ and Fe2+ on octahedral near-cluster sites with two vacancy nearest neighbors. Evidence is cited for an increase in Fe2+ on tetrahedral (interstitial) sites as temperature increases.

AB - A defect/electrical conduction model based upon a mixture of 5:2 and 13:4 (vacancy-to-tetrahedral) clusters is proposed for FeO which is consistent with available diffraction, nonstoichiometry and electrical data. Conduction occurs via small polaron hopping between Fe3+ and Fe2+ on octahedral near-cluster sites with two vacancy nearest neighbors. Evidence is cited for an increase in Fe2+ on tetrahedral (interstitial) sites as temperature increases.

KW - clusters

KW - defect clusters

KW - Defects

KW - electrical conductivity

KW - Seebeck coefficient

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JO - Journal of Physics and Chemistry of Solids

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