Abstract
We present a high-temperature expansion (HTE) of the magnetic susceptibility and specific heat data of Melzi et al. on [Phys. Rev. B 64, 024409 (2001)]. The data are very well reproduced by the Heisenberg model on the square lattice with exchange energies and The maximum of the specific heat is obtained as a function of from an improved method based on HTE.
- Received 27 February 2003
DOI:https://doi.org/10.1103/PhysRevB.68.113409
©2003 American Physical Society