LOCAL LATTICE DISTORTION DURING THE SPIN-STATE TRANSITION IN LACOO3

Authors
YAMAGUCHI S OKIMOTO Y TOKURA Y
Citation
S. Yamaguchi et al., LOCAL LATTICE DISTORTION DURING THE SPIN-STATE TRANSITION IN LACOO3, Physical review. B, Condensed matter, 55(14), 1997, pp. 8666-8669
Citations number
20
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
55
Issue
14
Year of publication
1997
Pages
8666 - 8669
Database
ISI
SICI code
0163-1829(1997)55:14<8666:LLDDTS>2.0.ZU;2-W
Abstract
Infrared spectroscopy of a LaCoO3 crystal has revealed anomalous split ting of the phonon modes as well as their intensity variation with tem perature during the spin-state transition. The observed results can be interpreted in terms of local lattice distortion arising from the Jah n-Teller effect of the thermally excited intermediate-spin (S=1) state of Co3+ ions. A possible role of the e(g) orbital ordering is discuss ed with the analysis of the intensity variation of the split Co-O stre tching modes.