Phys. Rev. B 55, R8666–R8669 (1997)Local lattice distortion during the spin-state transition in LaCoO3
Infrared spectroscopy of a LaCoO3 crystal has revealed anomalous splitting of the phonon modes as well as their intensity variation with temperature during the spin-state transition. The observed results can be interpreted in terms of local lattice distortion arising from the Jahn-Teller effect of the thermally excited intermediate-spin (S=1) state of Co3+ ions. A possible role of the eg orbital ordering is discussed with the analysis of the intensity variation of the split Co-O stretching modes. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.55.R8666
DOI:
10.1103/PhysRevB.55.R8666
PACS:
75.90.+w, 78.20.-e, 71.27.+a
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