Relaxation dynamics of iron-group dihalides
Articles > Article ยท 2007
Authors: Gul Gulpinar, Dogan Demirhan, Fevzi Buyukkilic
Physical Review E, International, WoS, 2007, vol 75, pp 021104-021104
DOI: 10.1103/physreve.75.021104
Summary
In this study, the relaxation dynamics of iron-group dihalides by making use of spin- 1/2 metamagnetic Ising model has been formulated by the method of thermodynamics of irreversible processes. Using a molecular field approximation for the magnetic Gibbs energy, the magnetic Gibbs energy production in the irreversible process is calculated and time derivatives of the order parameters are treated as fluxes conjugate to their appropriate generalized forces in the sense of Onsager's theory of irreversible thermodynamics. Two relaxation times are calculated and their temperature variances are examined. Moreover, the phase transition behaviors of the relaxation times are also obtained analytically via the critical exponents.