Sur la phase CsVCl3 : étude cristallographique et magnétique

Michel Niel (1) , Christian Cros (1) , Marcus Vlasse (1) , Michel Pouchard (1) , Paul Hagenmuller (1)

1 Laboratoire de Chimie du Solide

The crystal structure of CsVCl3 has been determined by means of a Patterson synthesis and refined by full-matrix least-squares to a residual R = 0.06. The space group is P63mmc with a=7.228 (3) A and c=6.030 (3) A. The structure of CsVCl3 belongs to the CsNiCl3 type. The magnetic properties have been interpreted on the basis of a S=32 model for Heisenberg one-dimensional interactions. The strong antifer-romagnetic intrachain V-V interactions (JK= -115K) seem to result from direct t2g - t2g coupling and from 90° correlation superexchange coupling using the 3s chlorine orbital.

Mots clés: Magnetic susceptibility; Cesium chlorovanadate; Spin; Crystal structure

Domaines: Matériaux

Michel Niel, Christian Cros, Marcus Vlasse, Michel Pouchard, Paul Hagenmuller. Sur la phase CsVCl3 : étude cristallographique et magnétique. Materials Research Bulletin, 1976, 11 (7), pp.827-836. ⟨10.1016/0025-5408(76)90122-7⟩. ⟨hal-00131563⟩