STRUCTURAL EVOLUTION OF SPIN-PEIERLS MATERIAL CUGEO3 STUDIED BY NEUTRON-SCATTERING

Authors
ARAI M FUJITA M UBUKATA K OHTA H MOTOKAWA M OTOMO T OHYAMA K MINO M AKIMITSU J FUJITA O
Citation
M. Arai et al., STRUCTURAL EVOLUTION OF SPIN-PEIERLS MATERIAL CUGEO3 STUDIED BY NEUTRON-SCATTERING, Journal of magnetism and magnetic materials, 140, 1995, pp. 1689-1690
Citations number
13
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
140
Year of publication
1995
Part
3
Pages
1689 - 1690
Database
ISI
SICI code
0304-8853(1995)140:<1689:SEOSMC>2.0.ZU;2-A
Abstract
The crystal structure and phonon dynamics of the spin-Peierls material CuGeO3 have been studied by neutron scattering. We found a large latt ice anomaly in the a-b plane, perpendicular to the one-dimensional ant iferromagnetic spin chain, above the transition temperature. The phono n modes at 100 meV, of the chain oxygens, show anomalous behavior, con sistent with structural change. We therefore conclude that the structu ral evolution of the chain oxygens in the a-b plane, which mediates th e spin-spin interaction along the c-axis, drives the spin-Peierls tran sition.