J. Phys. IV France
Volume 12, Numéro 9, November 2002
Page(s) 19 - 22

J. Phys. IV France
12 (2002) Pr9-19
DOI: 10.1051/jp4:20020345

Fractional-power law susceptibility and specific heat of o-TaSs

K. Biljakovic1, M. Miljak1, D. Staresinic1, J.C. Lasjaunias2, J. Souletie2 and P. Monceau2

1  Institute of Physics, P.0. Box 304, 10001 Zagreb, Croatia
2  CRTBT-CNRS, BP. 166,38042 Grenoble cedex 9, France

We report on the power-law dependence on temperature of the magnetic susceptibility and the specific heat of the CDW (charge density wave) system o-TaS 3. All the evidences are in favor of a typical REHAC (random exchange Heisenberg antiferromagnetic chain) behaviour [I], however in the diluted limit of spins s=1/2. We propose a consistent microscopic explanation of the corresponding elementary excitations within a new state formed below the glass transition demonstrated recently in this system [2].

© EDP Sciences 2002