Multicritical phase diagrams of the Blume-Emery-Griffiths model with repulsive biquadratic coupling including metastable phases

摘要: We investigate the thermal variations of spin-1 Blume-Emergy-Griffiths model with repulsive biquadratic interaction by using lowest approximation cluster-variation method. Besides stable branches order parameters, we obtain metastable and unstable parts these curves also find phase transitions parameters. The classification stable, metastable, states is made comparing free-energy values states. study dynamics path probability method in to make sure that define parameters completely correctly. This done studying relaxation as well expressing solution dynamic equations means flow diagrams. Finally, present diagrams addition equilibrium $(kT/J,D/J)$ $(kT/J,K/J)$ planes.