DYNAMIC DIPOLE AND QUADRUPOLE PHASE TRANSITIONS IN THE KINETIC SPIN-1 MODEL

Mustafa Keski̇n, Osman Canko and Ersin Kantar
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Mustafa Keski̇n: Erciyes University, Department of Physics, 38039 Kayseri, Turkey
Osman Canko: Erciyes University, Department of Physics, 38039 Kayseri, Turkey
Ersin Kantar: Institute of Science, Erciyes University, 38039 Kayseri, Turkey

International Journal of Modern Physics C (IJMPC), 2006, vol. 17, issue 09, 1239-1255

Abstract: The dynamic phase transitions have been studied, within a mean-field approach, in the kinetic spin-1 Ising model Hamiltonian with arbitrary bilinear and biquadratic pair interactions in the presence of a time varying (sinusoidal) magnetic field by using the Glauber-type stochastic dynamics. The nature (first- or second-order) of the transition is characterized by investigating the behavior of the thermal variation of the dynamic order parameters. The dynamic phase transitions (DPTs) are obtained and the phase diagrams are constructed in the temperature and magnetic field amplitude plane and found six fundamental types of phase diagrams. Phase diagrams exhibit one or two dynamic tricritical points depending on the biquadratic interaction (K). Besides the disordered (D) and ferromagnetic (F) phases, the FQ + D, F + FQ and F + D coexistence phase regions also exist in the system and the F and F + D phases disappear for high values ofK.

Keywords: Dynamic phase transition; oscillating magnetic field; mean-field dynamic equations of motion; spin-1 model; Glauber-type stochastic dynamics; 05.50.+q; 05.70.Fh; 64.60.Ht; 75.10.Hk (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S0129183106009862

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