Effective-field theory with the differential operator technique for a kinetic Blume–Capel model with random diluted single-ion anisotropy

Gul Gulpinar, Erol Vatansever and Mehmet Agartioglu

Physica A: Statistical Mechanics and its Applications, 2012, vol. 391, issue 13, 3574-3584

Abstract: We present the dynamical phase diagrams of the kinetic Blume–Capel model with random diluted single-ion anisotropy in a square lattice under the presence of a time-varying (oscillating) external magnetic field calculated by an analytical method, the effective-field theory (EFT). The kinetics is modeled with the formalism of a master equation. The time-averaged magnetization (M) acts as the order parameter and divides the temperature–field plane into three regions: ferromagnetic, paramagnetic, and coexistence of ferromagnetic and paramagnetic phases. In addition, the hysteresis loop area and the dynamic correlation function are calculated. It is observed that the inclusion of spin–spin correlations suppress the first-order transition lines and dynamical tricritical points for all values of the crystal-field concentration.

Keywords: Dynamic phase transition; Effective-field theory; Quenched disorder (search for similar items in EconPapers)
Date: 2012
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:391:y:2012:i:13:p:3574-3584

DOI: 10.1016/j.physa.2012.02.016

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