Non-stoichiometry, electrical properties, and cation diffusion in highly non-stoichiometric Co1-xO-I. Experimental†

K. Persels Constant, Thomas O Mason, S. J. Rothman, J. L. Routbort

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Non-stoichiometry and mass and electrical transport properties were measured in pure, single crystal Co1-xO with 0.003 ≤ x ≤ 0.044. Electrical conductivity and thermopower were measured at temperatures from 1000°C to 1200°C in a range of oxygen partial pressures, Po2 , of 0.21 to 32atm. The cation tracer diffusion coefficient was measured at 1200°C in the same pressure range, and at 3.7 atm from 1064°C to 1200°C. Electrical properties were used to locate the Co1-xO/Co3O4 phase boundary. All properties show a stronger po2 , dependence than predicted by a point defect theory based on ideal solutions. Analysis of the temperature dependence of hole mobility produced an activation energy for small polaron hopping of 0.37 ± 0.04 eV.

Original languageEnglish
Pages (from-to)405-411
Number of pages7
JournalJournal of Physics and Chemistry of Solids
Volume53
Issue number3
DOIs
Publication statusPublished - 1992

Fingerprint

hole mobility
point defects
tracers
partial pressure
Cations
Electric properties
diffusion coefficient
transport properties
Positive ions
electrical properties
activation energy
cations
Gene Conversion
temperature dependence
electrical resistivity
Hole mobility
single crystals
Thermoelectric power
Phase boundaries
oxygen

Keywords

  • Cobalt monoxide
  • diffusion
  • electrical conductivity
  • non-stoichiometry
  • point defects
  • small polaron
  • thermoelectric power

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Non-stoichiometry, electrical properties, and cation diffusion in highly non-stoichiometric Co1-xO-I. Experimental†. / Persels Constant, K.; Mason, Thomas O; Rothman, S. J.; Routbort, J. L.

In: Journal of Physics and Chemistry of Solids, Vol. 53, No. 3, 1992, p. 405-411.

Research output: Contribution to journalArticle

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