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

doi:10.1006/jssc.2002.9722

Order-disorder enhanced oxygen conductivity and electron transport in Ruddlesden-Popper ferrite-titanate Sr₃Fe_2-xti_xO_6+δ

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

Northwestern University

Research output: Contribution to journal › Article

40 Citations (Scopus)

Abstract

The Ruddlesden-Popper ferrite Sr₃Fe₂O_6+δ and its titania-doped derivatives Sr₃Fe₂-_xTi_xO_6+δ, where 03Fe₂O_6+δ and Sr₃Fe_0.8Ti_1.2 O_6+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 language	English
Pages (from-to)	275-283
Number of pages	9
Journal	Journal of Solid State Chemistry
Volume	168
Issue number	1
DOIs	https://doi.org/10.1006/jssc.2002.9722
Publication status	Published - Oct 2002

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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

Shilova, Y. A., Patrakeev, M. V., Mitberg, E. B., Leonidov, I. A., Kozhevnikov, V. L., & Poeppelmeier, K. R. (2002). Order-disorder enhanced oxygen conductivity and electron transport in Ruddlesden-Popper ferrite-titanate Sr₃Fe_2-xti_xO_6+δ Journal of Solid State Chemistry, 168(1), 275-283. https://doi.org/10.1006/jssc.2002.9722

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

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.",

keywords = "Electron conductivity, Oxygen conductivity, Oxygen transfer, Ruddlesden-Popper ferrite, Thermopower",

author = "Shilova, {Y. A.} and Patrakeev, {M. V.} and Mitberg, {E. B.} and Leonidov, {I. A.} and Kozhevnikov, {V. L.} and Poeppelmeier, {Kenneth R}",

year = "2002",

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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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N2 - 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.

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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Access to Document

10.1006/jssc.2002.9722