Premium
Thermodynamic Investigations of the Phase Transition in Ferroelastic CoZrF 6
Author(s) -
Gorev M. V.,
Flerov I. N.,
Tressaud A.,
Grannec J.,
Rodriguez V.,
Couzi M.
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221690108
Subject(s) - thermodynamics , phase transition , hydrostatic pressure , heat capacity , landau theory , entropy (arrow of time) , hydrostatic equilibrium , specific heat , materials science , first order , condensed matter physics , physics , mathematics , quantum mechanics
The heat capacity and the pressure dependence of the phase transition temperature of CoZrF 6 are measured. The first order phase transition Fm3m → R 3 is characterized by large values of both, the entropy change Δ S = (5.8 ± 0.8) J mol −1 K −1 and the rate of increase of the transition temperature T 0 with applied hydrostatic pressure, d T 0 /d p = (340 ± 40) K GPa −1 . An analysis of the results is performed in terms of the Landau theory. The parameters of the thermodynamic potential are determined.