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 journalArticleAcademicpeer-review

206 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 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.

Original languageEnglish
Article number224423
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number22
DOIs
Publication statusPublished - 18 Jun 2003
Externally publishedYes

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