Order-disorder enhanced oxygen conductivity and electron transport in Ruddlesden-Popper ferrite-titanate Sr3Fe2-xtixO6+δ

Y. A. Shilova, M. V. Patrakeev, E. B. Mitberg, I. A. Leonidov, V. L. Kozhevnikov, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The Ruddlesden-Popper ferrite Sr3Fe2O6+δ and its titania-doped derivatives Sr3Fe2-xTixO6+δ, where 03Fe2O6+δ and Sr3Fe0.8Ti1.2 O6+δ in the temperature range 750-1000°C and oxygen partial pressures (pO2) varying between 10-20 and 0.5 atm revealed that the predominant partial conductivity of electrons is proportional to pO2 -1/4 in the low pO2 region, while the predominant partial contribution of holes to the conductivity is proportional to pO2 +1/4 in the high pO2 range. The pressure-independent oxygen ion conductivity is found to decrease with the increase in titanium content. A possible pathway for oxygen ion migration is discussed in relation to disorder in the oxygen sublattice and titanium doping.

Original languageEnglish
Pages (from-to)275-283
Number of pages9
JournalJournal of Solid State Chemistry
Volume168
Issue number1
DOIs
Publication statusPublished - Oct 2002

Fingerprint

Order disorder transitions
Ferrite
ferrites
titanium
disorders
Oxygen
oxygen ions
conductivity
Titanium
oxygen
electrons
Ions
sublattices
partial pressure
Partial pressure
Doping (additives)
Derivatives
Electron Transport
Electrons
temperature

Keywords

  • Electron conductivity
  • Oxygen conductivity
  • Oxygen transfer
  • Ruddlesden-Popper ferrite
  • Thermopower

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Order-disorder enhanced oxygen conductivity and electron transport in Ruddlesden-Popper ferrite-titanate Sr3Fe2-xtixO6+δ . / Shilova, Y. A.; Patrakeev, M. V.; Mitberg, E. B.; Leonidov, I. A.; Kozhevnikov, V. L.; Poeppelmeier, Kenneth R.

In: Journal of Solid State Chemistry, Vol. 168, No. 1, 10.2002, p. 275-283.

Research output: Contribution to journalArticle

Shilova, Y. A. ; Patrakeev, M. V. ; Mitberg, E. B. ; Leonidov, I. A. ; Kozhevnikov, V. L. ; Poeppelmeier, Kenneth R. / Order-disorder enhanced oxygen conductivity and electron transport in Ruddlesden-Popper ferrite-titanate Sr3Fe2-xtixO6+δ In: Journal of Solid State Chemistry. 2002 ; Vol. 168, No. 1. pp. 275-283.
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AU - Shilova, Y. A.

AU - Patrakeev, M. V.

AU - Mitberg, E. B.

AU - Leonidov, I. A.

AU - Kozhevnikov, V. L.

AU - Poeppelmeier, Kenneth R

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AB - The Ruddlesden-Popper ferrite Sr3Fe2O6+δ and its titania-doped derivatives Sr3Fe2-xTixO6+δ, where 03Fe2O6+δ and Sr3Fe0.8Ti1.2 O6+δ in the temperature range 750-1000°C and oxygen partial pressures (pO2) varying between 10-20 and 0.5 atm revealed that the predominant partial conductivity of electrons is proportional to pO2 -1/4 in the low pO2 region, while the predominant partial contribution of holes to the conductivity is proportional to pO2 +1/4 in the high pO2 range. The pressure-independent oxygen ion conductivity is found to decrease with the increase in titanium content. A possible pathway for oxygen ion migration is discussed in relation to disorder in the oxygen sublattice and titanium doping.

KW - Electron conductivity

KW - Oxygen conductivity

KW - Oxygen transfer

KW - Ruddlesden-Popper ferrite

KW - Thermopower

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