Evidence for orbital ordering in LaCoO3

G. Maris; Y. Ren; V. Volotchaev; C. Zobel; T. Lorenz; T. T.M. Palstra

doi:10.1103/PhysRevB.67.224423

Evidence for orbital ordering in LaCoO₃

G. Maris, Y. Ren, V. Volotchaev, C. Zobel, T. Lorenz, T. T.M. Palstra^*

^*Corresponding author for this work

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

227 Citations (Scopus)

Abstract

We present powder and single-crystal x-ray diffraction data as evidence for a monoclinic distortion in the low-spin (S = 0) and intermediate spin states (S = 1) of LaCoO₃. The alternation of short and long bonds in the ab plane indicates the presence of e_g orbital ordering induced by a cooperative Jahn-Teller distortion. We observe an increase of the Jahn-Teller distortion with temperature in agreement with a thermally activated behavior of the Co³⁺ ions from a low-spin ground state to an intermediate-spin excited state.

Original language	English
Article number	224423
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	67
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.67.224423
Publication status	Published - 18 Jun 2003
Externally published	Yes

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10.1103/PhysRevB.67.224423

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T1 - Evidence for orbital ordering in LaCoO3

AU - Maris, G.

AU - Ren, Y.

AU - Volotchaev, V.

AU - Zobel, C.

AU - Lorenz, T.

AU - Palstra, T. T.M.

PY - 2003/6/18

Y1 - 2003/6/18

N2 - We present powder and single-crystal x-ray diffraction data as evidence for a monoclinic distortion in the low-spin (S = 0) and intermediate spin states (S = 1) of LaCoO3. The alternation of short and long bonds in the ab plane indicates the presence of eg orbital ordering induced by a cooperative Jahn-Teller distortion. We observe an increase of the Jahn-Teller distortion with temperature in agreement with a thermally activated behavior of the Co3+ ions from a low-spin ground state to an intermediate-spin excited state.

AB - We present powder and single-crystal x-ray diffraction data as evidence for a monoclinic distortion in the low-spin (S = 0) and intermediate spin states (S = 1) of LaCoO3. The alternation of short and long bonds in the ab plane indicates the presence of eg orbital ordering induced by a cooperative Jahn-Teller distortion. We observe an increase of the Jahn-Teller distortion with temperature in agreement with a thermally activated behavior of the Co3+ ions from a low-spin ground state to an intermediate-spin excited state.

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DO - 10.1103/PhysRevB.67.224423

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 22

M1 - 224423

ER -

Evidence for orbital ordering in LaCoO₃

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