J. Phys. IV France 12 (2002) Pr9-19
Fractional-power law susceptibility and specific heat of o-TaSsK. 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 .
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