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

Keywords

Electron conductivity
Oxygen conductivity
Oxygen transfer
Ruddlesden-Popper ferrite
Thermopower

ASJC Scopus subject areas

Inorganic Chemistry
Physical and Theoretical Chemistry
Materials Chemistry

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10.1006/jssc.2002.9722

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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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doi = "10.1006/jssc.2002.9722",

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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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