Conductivity and carrier traps in La1-xSrxCo 1-zMnzO3-δ ( x=0.3; z=0 and 0.25)

V. L. Kozhevnikov; I. A. Leonidov; E. B. Mitberg; M. V. Patrakeev; A. N. Petrov; K. R. Poeppelmeier

doi:10.1016/S0022-4596(03)00088-4

Conductivity and carrier traps in La_1-xSr_xCo _1-zMn_zO_3-δ ( x=0.3; z=0 and 0.25)

V. L. Kozhevnikov^*, I. A. Leonidov, E. B. Mitberg, M. V. Patrakeev, A. N. Petrov, K. R. Poeppelmeier

^*Corresponding author for this work

Chemistry

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

31 Scopus citations

Abstract

Measurements of the equilibrium oxygen content, electrical conductivity and thermopower in the perovskite-like solid solution La_0.7Sr _0.3Co_1-zMn_zO_3-δ (z=0 and 0.25) as a function of the temperature and oxygen partial pressure are used to determine the temperature dependence of the conductivity and thermopower at different values of the oxygen deficiency. A model for a hopping conductor with screened charge disproportionation is applied for the data analysis in combination with trapping reactions of n- and p-type carriers on local oxygen vacancy clusters and manganese cations, respectively. Changes in the ratio of n-type to p-type mobility are due to variations in oxygen vacancy concentration and manganese content, while the energetic parameters governing charge disproportionation of the trivalent cobalt cations and formation of vacancy associates are shown to be essentially invariable. These calculated charge carrier site occupancies are used to model temperature variations of the electrical properties in La_0.7Sr_0.3Co_1-zMn _zO_3-δ in favorable correspondence with experimental observations.

Original language	English (US)
Pages (from-to)	296-304
Number of pages	9
Journal	Journal of Solid State Chemistry
Volume	172
Issue number	2
DOIs	https://doi.org/10.1016/S0022-4596(03)00088-4
State	Published - May 2003

Keywords

Cobaltite
Electrical conductivity
Hopping conductor
Manganite
Oxygen content
Perovskite
Thermopower

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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@article{4deacf563ee44f39b2ead55cca9fab1b,

title = "Conductivity and carrier traps in La1-xSrxCo 1-zMnzO3-δ ( x=0.3; z=0 and 0.25)",

abstract = "Measurements of the equilibrium oxygen content, electrical conductivity and thermopower in the perovskite-like solid solution La0.7Sr 0.3Co1-zMnzO3-δ (z=0 and 0.25) as a function of the temperature and oxygen partial pressure are used to determine the temperature dependence of the conductivity and thermopower at different values of the oxygen deficiency. A model for a hopping conductor with screened charge disproportionation is applied for the data analysis in combination with trapping reactions of n- and p-type carriers on local oxygen vacancy clusters and manganese cations, respectively. Changes in the ratio of n-type to p-type mobility are due to variations in oxygen vacancy concentration and manganese content, while the energetic parameters governing charge disproportionation of the trivalent cobalt cations and formation of vacancy associates are shown to be essentially invariable. These calculated charge carrier site occupancies are used to model temperature variations of the electrical properties in La0.7Sr0.3Co1-zMn zO3-δ in favorable correspondence with experimental observations.",

keywords = "Cobaltite, Electrical conductivity, Hopping conductor, Manganite, Oxygen content, Perovskite, Thermopower",

author = "Kozhevnikov, {V. L.} and Leonidov, {I. A.} and Mitberg, {E. B.} and Patrakeev, {M. V.} and Petrov, {A. N.} and Poeppelmeier, {K. R.}",

note = "Funding Information: This research was supported by the International Association (INTAS) of the European Community under Contract No. 2000-00728. The partial support from the US Civilian Research and Development Foundation (CRDF, Grant No. REC 005) is greatly appreciated. One of us (K.R.P.) is grateful to the EMSI program of the National Science Foundation and the US Department of Energy Office of Science (CHE-9810378) at the Northwestern University Institute for Environmental Catalysis. We are particularly grateful to the reviewer who attracted our attention to publication [17] .",

year = "2003",

month = may,

doi = "10.1016/S0022-4596(03)00088-4",

language = "English (US)",

volume = "172",

pages = "296--304",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

number = "2",

}

TY - JOUR

T1 - Conductivity and carrier traps in La1-xSrxCo 1-zMnzO3-δ ( x=0.3; z=0 and 0.25)

AU - Kozhevnikov, V. L.

AU - Leonidov, I. A.

AU - Mitberg, E. B.

AU - Patrakeev, M. V.

AU - Petrov, A. N.

AU - Poeppelmeier, K. R.

N1 - Funding Information: This research was supported by the International Association (INTAS) of the European Community under Contract No. 2000-00728. The partial support from the US Civilian Research and Development Foundation (CRDF, Grant No. REC 005) is greatly appreciated. One of us (K.R.P.) is grateful to the EMSI program of the National Science Foundation and the US Department of Energy Office of Science (CHE-9810378) at the Northwestern University Institute for Environmental Catalysis. We are particularly grateful to the reviewer who attracted our attention to publication [17] .

PY - 2003/5

Y1 - 2003/5

N2 - Measurements of the equilibrium oxygen content, electrical conductivity and thermopower in the perovskite-like solid solution La0.7Sr 0.3Co1-zMnzO3-δ (z=0 and 0.25) as a function of the temperature and oxygen partial pressure are used to determine the temperature dependence of the conductivity and thermopower at different values of the oxygen deficiency. A model for a hopping conductor with screened charge disproportionation is applied for the data analysis in combination with trapping reactions of n- and p-type carriers on local oxygen vacancy clusters and manganese cations, respectively. Changes in the ratio of n-type to p-type mobility are due to variations in oxygen vacancy concentration and manganese content, while the energetic parameters governing charge disproportionation of the trivalent cobalt cations and formation of vacancy associates are shown to be essentially invariable. These calculated charge carrier site occupancies are used to model temperature variations of the electrical properties in La0.7Sr0.3Co1-zMn zO3-δ in favorable correspondence with experimental observations.

AB - Measurements of the equilibrium oxygen content, electrical conductivity and thermopower in the perovskite-like solid solution La0.7Sr 0.3Co1-zMnzO3-δ (z=0 and 0.25) as a function of the temperature and oxygen partial pressure are used to determine the temperature dependence of the conductivity and thermopower at different values of the oxygen deficiency. A model for a hopping conductor with screened charge disproportionation is applied for the data analysis in combination with trapping reactions of n- and p-type carriers on local oxygen vacancy clusters and manganese cations, respectively. Changes in the ratio of n-type to p-type mobility are due to variations in oxygen vacancy concentration and manganese content, while the energetic parameters governing charge disproportionation of the trivalent cobalt cations and formation of vacancy associates are shown to be essentially invariable. These calculated charge carrier site occupancies are used to model temperature variations of the electrical properties in La0.7Sr0.3Co1-zMn zO3-δ in favorable correspondence with experimental observations.

KW - Cobaltite

KW - Electrical conductivity

KW - Hopping conductor

KW - Manganite

KW - Oxygen content

KW - Perovskite

KW - Thermopower

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AN - SCOPUS:0344065531

VL - 172

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EP - 304

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

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