Dynamic phase transition in the kinetic spin-2 Blume–Emery–Griffiths model in an oscillating field

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• 作者：Mehmet Ertaş ; Osman Canko ; Mustafa Keskin
• 关键词：Spin-2 Blume&#x2013 ; Emery&#x2013 ; Griffiths model ; Dynamic phase transitions ; Oscillating magnetic field ; Glauber-type stochastic dynamics
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2008
• 期刊代码：31_03048853
• 类别：ph
• 出版时间：June 2008
• 卷：320
• 期：11
• 页码：1765-1774
• 文件大小：497 K

摘要

We extend our recent paper [M. Keskin, O. Canko, M. Ertaş, J. Exp. Theor. Phys. (Sov. Phys. JETP) 105 (2007) 1190.] to present a study, within a mean-field approach, the stationary states of the kinetic spin-2 Blume–Emery–Griffiths model in the presence of a time-dependent oscillating magnetic field by using the Glauber-type of stochastic dynamics. We found 20 fundamental types of dynamic phase diagrams where exhibit more complex and richer phase diagrams than our recent paper. Especially, the obtained dynamic phase diagrams show the dynamic triple, quadruple and dynamic double critical end points besides dynamic tricritical points that depending on interaction parameters. The phase diagrams also exhibit a disordered (d) and the ferromagnetic-2 (f₂) phases, and the f₂+d, f₂+fq, fq+d, f₂+f₁+fq and f₂+fq+d, where f₁ are fq the ferromagnetic-1 and ferroquadrupolar or simply quadrupolar phases respectively, coexistence phase regions that strongly depend on interaction parameters.