Dynamic phase transition in the kinetic spin- 3 2 Blume–Capel model: Phase diagrams in the temperature and crystal-field interaction plane

• Published in: Journal of magnetism and magnetic materials Vol. 313; no. 1; pp. L1 - L5
• Main Authors: Keskin, Mustafa, Canko, Osman, Deviren, Bayram
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.06.2007; Elsevier Science
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Critical-point effects, specific heats, short-range order; Dynamic phase transitions; Exact sciences and technology; General theory and models of magnetic ordering; Glauber-type stochastic dynamics; Magnetic properties and materials; Phase diagrams; Physics; Spin- [formula omitted] Blume–Capel model; Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.); 75.10.Hk; 05.70.Fh; 64.60.Ht; 05.50.+q; Phase diagrams; Dynamic phase transitions; Glauber-type stochastic dynamics; Spin- 3 2 Blume–Capel model; Stochastic model; Order-disorder transformations; Mean field approximation; Magnetization; Critical points; Magnetic field effects; Dynamic properties; Spin- 3/2 Blume-Capel model; Crystal field interactions; Tricritical point; Ising model
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2007.01.009

We analyze, within a mean-field approach, the stationary states of the kinetic spin- 3 2 Blume–Capel (BC) model by the Glauber-type stochastic dynamics and subject to a time-dependent oscillating external magnetic field. The dynamic phase transition (DPT) points are obtained by investigating the behavior of the dynamic magnetization as a function of temperature and as well as calculating the Liapunov exponent. Phase diagrams are constructed in the temperature and crystal–field interaction plane. We find five fundamental types of phase diagrams for the different values of the reduced magnetic field amplitude parameter ( h) in which they present a disordered, two ordered phases and the coexistences phase regions. The phase diagrams also exhibit a dynamic double-critical end point for 0< h⩽1.44, one dynamic tricritical point for 1.44< h⩽5.06 and two dynamic tricritical points for h>5.06.