DYNAMIC PHASE TRANSITION IN THE KINETIC SPIN-1 BLUME - CAPEL MODEL: PHASE DIAGRAMS IN THE TEMPERATURE AND CRYSTAL-FIELD INTERACTION PLANE
Keskin M., Canko O., Temizer U.

Поступила в редакцию: 6 Декабря 2006

PACS: 05.50.+q, 05.70.Fh, 64.60.Ht, 75.10.Hk

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Within a mean-field approach, we study the stationary states of the kinetic spin-1 Blume - Capel model in presence of a time-dependent oscillating external magnetic field. We use the Glauber-type stochastic dynamics to describe the time evolution of the system and obtain the mean-field dynamic equation of the motion. The dynamic phase transition points are calculated and phase diagrams are presented in the temperature and crystal-field interaction plane. According to the values of the magnetic field amplitude, we find three fundamental types of phase diagrams in which they exhibit a dynamic tricritical point and only two of them a dynamic zero-temperature critical point.