Anisotropic classical chain: Numerical calculations of thermodynamic properties

Thermodynamic properties are computed for the classical linear chain with orthorhombic anisotropy in an external magnetic field. Special attention has been given to crossover effects between different model systems as a function of temperature and field. The ordering temperature of quasi-one-dimensional systems is computed as a function of the interchain interactions and the anisotropy. Results are compared with other theories.