Akademik Veri Yönetim Sistemi
European Physical Journal Plus, cilt.140, sa.11, 2025 (SCI-Expanded, Scopus)
The present study investigates the relaxation theory of a (1, 2)-mixed spin ferromagnetic model with two distinct crystal fields. It employs an approach that combines the equilibrium theory of cooperative phenomena and Onsager irreversible thermodynamics. In this study, generalized fluxes are given by the derivative of the sublattice magnetizations with respect to time. The kinetic equations are written by writing the linear relations between the generalized fluxes and the conjugate generalized forces. Two relaxation times are calculated, τ1, τ2. The reduced temperature (Tr) dependence of the τ1, τ2 for different reduced sublattice crystal fields (DAr and DBr) and the Onsager kinetic coefficients (γ ) values is examined near the phase boundary for four distinctly different topological structures. In particular, τ2 increases rapidly on both sides of the continuous phase transition temperatures, close to the critical and tri-critical points delineating the ferromagnetic and disordered phases. A comparative analysis of the present results is provided from earlier experimental and theoretical studies.