Numéro
J. Phys. IV France
Volume 03, Numéro C2, Juillet 1993
International Workshop on Electronic Crystals
ECRYS - 93
Page(s) C2-251 - C2-254
DOI http://dx.doi.org/10.1051/jp4:1993250
International Workshop on Electronic Crystals
ECRYS - 93

J. Phys. IV France 03 (1993) C2-251-C2-254

DOI: 10.1051/jp4:1993250

Spin-Peierls instability in Per2 [M(mnt)2] compounds probed by specific heat

G. BONFAIT, M.J. MATOS, R.T. HENRIQUES and M. ALMEIDA

Departamento de Quimica, ICEN-LNETI, 2686 Sacavem codex, Portugal


Abstract
Specific heat measurements on Per2 [M(mnt)2] compounds with M=Pt and Au are reported. An anomaly was found in the Pt compound, ascribed to the magnetic ordering of the Pt(mnt)2 chains as in the Spin-Peierls transition. The comparison of the two compounds enabled a precise determination of the magnetic specific heat. Results above the transition temperature are better fitted by the Ising model rather by the Bonner-Fisher calculations on the Heisenberg model.



© EDP Sciences 1993