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Chin. Phys. B, 2013, Vol. 22(12): 120507    DOI: 10.1088/1674-1056/22/12/120507
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Dynamic magnetic behavior of the mixed spin (2, 5/2) Ising system with antiferromagnetic/antiferromagnetic interactions on a bilayer square lattice

Mehmet Ertaş, Mustafa Keskin
Department of Physics, Erciyes University, 38039 Kayseri, Turkey
Abstract  Using the mean-field theory and Glauber-type stochastic dynamics, we study the dynamic magnetic properties of the mixed spin (2, 5/2) Ising system for the antiferromagnetic/antiferromagnetic (AFM/AFM) interactions on the bilayer square lattice under a time varying (sinusoidal) magnetic field. The time dependence of average magnetizations and the thermal variation of the dynamic magnetizations are examined to calculate the dynamic phase diagrams. The dynamic phase diagrams are presented in the reduced temperature and magnetic field amplitude plane and the effects of interlayer coupling interaction on the critical behavior of the system are investigated. We also investigate the influence of the frequency and find that the system displays richer dynamic critical behavior for higher values of frequency than that of the lower values of it. We perform a comparison with the ferromagnetic/ferromagnetic (FM/FM) and AFM/FM interactions in order to see the effects of AFM/AFM interaction and observe that the system displays richer and more interesting dynamic critical behaviors for the AFM/AFM interaction than those for the FM/FM and AFM/FM interactions.
Keywords:  dynamic magnetic behavior of a bilayer Ising system      mixed spins      glauber-type stochastic dynamics      antiferromagnetic/antiferromagnetic interactions  
Received:  18 May 2013      Revised:  04 July 2013      Published:  25 October 2013
PACS:  05.50.+q (Lattice theory and statistics)  
  05.70.Fh (Phase transitions: general studies)  
  64.60.Ht (Dynamic critical phenomena)  
  75.10.Hk (Classical spin models)  
Corresponding Authors:  Mehmet Ertaş     E-mail:  mehmetertas@erciyes.edu.tr

Cite this article: 

Mehmet Ertaş, Mustafa Keskin Dynamic magnetic behavior of the mixed spin (2, 5/2) Ising system with antiferromagnetic/antiferromagnetic interactions on a bilayer square lattice 2013 Chin. Phys. B 22 120507

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