These phenomena may be divided into universality classes based on how their correlation lengths diverge as a certain variable approaches a critical value.
These phenomena may be divided into universality classes based on how their correlation lengths diverge as a certain variable approaches a critical value. Another classification of these phenomena developed by Paul Ehrenfest is based on discontinuities in the derivative of the free energy, and their (*) second-order variety are described phenomenologically by Lev Landau by order parameters. One occurs at the Neel point, the antiferromagnetic analogue of the Curie temperature. The Clausius-Clapeyron relation characterizes them in a gas-liquid system. FTP, name these thermodynamic transitions, examples of which include deposition, sublimation, condensation, freezing, and other changes of state.
These phenomena may be divided into universality classes based on how their correlation lengths diverge as a certain variable approaches a critical value.
phase transitions [prompt on changes of state before mentioned]