XAFS and neutron diffraction study of the La1-xSr xCoO3

V. Efimov; E. Efimova; D. Karpinsky; D. I. Kochubey; V. Kriventsov; A. Kuzmin; S. Molodtsov; V. Sikolenko; S. Tiutiunnikov; I. O. Troyanchuk; A. N. Shmakov; D. Vyalikh

doi:10.1002/pssc.200673874

XAFS and neutron diffraction study of the La_1-xSr _xCoO₃

V. Efimov^*
, E. Efimova
, D. Karpinsky
, D. I. Kochubey
, V. Kriventsov
, A. Kuzmin
, S. Molodtsov
, V. Sikolenko
, S. Tiutiunnikov
, I. O. Troyanchuk
, A. N. Shmakov
, D. Vyalikh

^*Corresponding author for this work

EXAFS Spectroscopy Laboratory, Institute of Solid State Physics

Research output: Contribution to journal › Conference article › peer-review

8 Citations (Scopus)

Abstract

We have studied the effects of hole doping on the crystal and electronic structure of the La_1-xSr_xCoO₃ (x = 0.0 ÷ 0.5) by neutron Rietveld analysis and its correlation with the X-ray-absorption spectroscopy data. The abrupt decrease of the Co-O distance and an increase of the Co-O-Co angle upon substitution of La³⁺ by Sr²⁺ in La_1-xSr_xCoO₃ are attributed to a change in the band structure at the transition from semiconducting to metallic state. Upon strontium doping, a variation of Co L_2,3-edges in La _1-xSr_xCoO₃ series suggests an increase of the mixed low Co⁴⁺ and high or intermediate Co³⁺ spin states. The possible explanation of the observed changes of the crystal and electronic structure in these cobaltites is discussed.

Original language	English
Pages (from-to)	805-808
Number of pages	4
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	4
Issue number	3
DOIs	https://doi.org/10.1002/pssc.200673874
Publication status	Published - 2007
Event	10th Europhysical Conference on Defects in Insulating Materials, EURODIM 2006 - Milano, Italy Duration: 10 Jul 2006 → 14 Jul 2006

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@article{58ce17d5bef74361b8a292f8564aa259,

title = "XAFS and neutron diffraction study of the La1-xSr xCoO3",

abstract = "We have studied the effects of hole doping on the crystal and electronic structure of the La1-xSrxCoO3 (x = 0.0 ÷ 0.5) by neutron Rietveld analysis and its correlation with the X-ray-absorption spectroscopy data. The abrupt decrease of the Co-O distance and an increase of the Co-O-Co angle upon substitution of La3+ by Sr2+ in La1-xSrxCoO3 are attributed to a change in the band structure at the transition from semiconducting to metallic state. Upon strontium doping, a variation of Co L2,3-edges in La 1-xSrxCoO3 series suggests an increase of the mixed low Co4+ and high or intermediate Co3+ spin states. The possible explanation of the observed changes of the crystal and electronic structure in these cobaltites is discussed.",

author = "V. Efimov and E. Efimova and D. Karpinsky and Kochubey, \{D. I.\} and V. Kriventsov and A. Kuzmin and S. Molodtsov and V. Sikolenko and S. Tiutiunnikov and Troyanchuk, \{I. O.\} and Shmakov, \{A. N.\} and D. Vyalikh",

year = "2007",

doi = "10.1002/pssc.200673874",

language = "English",

volume = "4",

pages = "805--808",

journal = "Physica Status Solidi (C) Current Topics in Solid State Physics",

issn = "1862-6351",

publisher = "Wiley-VCH Verlag",

number = "3",

note = "10th Europhysical Conference on Defects in Insulating Materials, EURODIM 2006 ; Conference date: 10-07-2006 Through 14-07-2006",

}

TY - JOUR

T1 - XAFS and neutron diffraction study of the La1-xSr xCoO3

AU - Efimov, V.

AU - Efimova, E.

AU - Karpinsky, D.

AU - Kochubey, D. I.

AU - Kriventsov, V.

AU - Kuzmin, A.

AU - Molodtsov, S.

AU - Sikolenko, V.

AU - Tiutiunnikov, S.

AU - Troyanchuk, I. O.

AU - Shmakov, A. N.

AU - Vyalikh, D.

PY - 2007

Y1 - 2007

N2 - We have studied the effects of hole doping on the crystal and electronic structure of the La1-xSrxCoO3 (x = 0.0 ÷ 0.5) by neutron Rietveld analysis and its correlation with the X-ray-absorption spectroscopy data. The abrupt decrease of the Co-O distance and an increase of the Co-O-Co angle upon substitution of La3+ by Sr2+ in La1-xSrxCoO3 are attributed to a change in the band structure at the transition from semiconducting to metallic state. Upon strontium doping, a variation of Co L2,3-edges in La 1-xSrxCoO3 series suggests an increase of the mixed low Co4+ and high or intermediate Co3+ spin states. The possible explanation of the observed changes of the crystal and electronic structure in these cobaltites is discussed.

AB - We have studied the effects of hole doping on the crystal and electronic structure of the La1-xSrxCoO3 (x = 0.0 ÷ 0.5) by neutron Rietveld analysis and its correlation with the X-ray-absorption spectroscopy data. The abrupt decrease of the Co-O distance and an increase of the Co-O-Co angle upon substitution of La3+ by Sr2+ in La1-xSrxCoO3 are attributed to a change in the band structure at the transition from semiconducting to metallic state. Upon strontium doping, a variation of Co L2,3-edges in La 1-xSrxCoO3 series suggests an increase of the mixed low Co4+ and high or intermediate Co3+ spin states. The possible explanation of the observed changes of the crystal and electronic structure in these cobaltites is discussed.

UR - https://www.scopus.com/pages/publications/49649083123

U2 - 10.1002/pssc.200673874

DO - 10.1002/pssc.200673874

M3 - Conference article

AN - SCOPUS:49649083123

SN - 1862-6351

VL - 4

SP - 805

EP - 808

JO - Physica Status Solidi (C) Current Topics in Solid State Physics

JF - Physica Status Solidi (C) Current Topics in Solid State Physics

IS - 3

T2 - 10th Europhysical Conference on Defects in Insulating Materials, EURODIM 2006

Y2 - 10 July 2006 through 14 July 2006

ER -

XAFS and neutron diffraction study of the La_1-xSr _xCoO₃

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