Dynamic compensation temperature in kinetic spin-5/2 Ising model on hexagonal lattice

doi:10.1088/1674-1056/22/3/037501

中国物理B ›› 2013, Vol. 22 ›› Issue (3): 37501-037501.doi: 10.1088/1674-1056/22/3/037501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Dynamic compensation temperature in kinetic spin-5/2 Ising model on hexagonal lattice

Ümüt Temizer^a, Ayşegül Özkılıç^b

a Department of Physics, Bozok University, 66200 Yozgat, Turkey;
b Institute of Science, Bozok University, 66200 Yozgat, Turkey

收稿日期:2012-08-02 出版日期:2013-02-01 发布日期:2013-02-01

Dynamic compensation temperature in kinetic spin-5/2 Ising model on hexagonal lattice

Ümüt Temizer^a, Ayşegül Özkılıç^b

a Department of Physics, Bozok University, 66200 Yozgat, Turkey;
b Institute of Science, Bozok University, 66200 Yozgat, Turkey

Received:2012-08-02 Online:2013-02-01 Published:2013-02-01
Contact: Ümüt Temizer E-mail:umut.temizer@bozok.edu.tr

摘要/Abstract

摘要： We present a study of the dynamic behavior of a two-sublattice spin-5/2 Ising model with bilinear and crystal-field interactions in the presence of a time-dependent oscillating external magnetic field on alternate layers of a hexagonal lattice by using the Glauber-type stochastic dynamics. The lattice is formed by alternate layers of spins σ=5/2 and S=5/2. We employ the Glauber transition rates to construct the mean-field dynamic equations. First, we investigate the time variations of the average sublattice magnetizations to find the phases in the system and then the thermal behavior of the dynamic sublattice magnetizations to characterize the nature (first- or second-order) of the phase transitions and to obtain the dynamic phase transition (DPT) points. We also study the thermal behavior of the dynamic total magnetization to find the dynamic compensation temperature and to determine the type of the dynamic compensation behavior. We present the dynamic phase diagrams, including the dynamic compensation temperatures, in nine different planes. The phase diagrams contain seven different fundamental phases, thirteen different mixed phases, in which the binary and ternary combination of fundamental phases and the compensation temperature or the L-type behavior strongly depend on the interaction parameters.

关键词: kinetic Ising model, dynamic phase transition, dynamic compensation temperature

Abstract: We present a study of the dynamic behavior of a two-sublattice spin-5/2 Ising model with bilinear and crystal-field interactions in the presence of a time-dependent oscillating external magnetic field on alternate layers of a hexagonal lattice by using the Glauber-type stochastic dynamics. The lattice is formed by alternate layers of spins σ=5/2 and S=5/2. We employ the Glauber transition rates to construct the mean-field dynamic equations. First, we investigate the time variations of the average sublattice magnetizations to find the phases in the system and then the thermal behavior of the dynamic sublattice magnetizations to characterize the nature (first- or second-order) of the phase transitions and to obtain the dynamic phase transition (DPT) points. We also study the thermal behavior of the dynamic total magnetization to find the dynamic compensation temperature and to determine the type of the dynamic compensation behavior. We present the dynamic phase diagrams, including the dynamic compensation temperatures, in nine different planes. The phase diagrams contain seven different fundamental phases, thirteen different mixed phases, in which the binary and ternary combination of fundamental phases and the compensation temperature or the L-type behavior strongly depend on the interaction parameters.

Key words: kinetic Ising model, dynamic phase transition, dynamic compensation temperature

中图分类号: (Classical spin models)

75.10.Hk

74.40.Gh (Nonequilibrium superconductivity) 64.60.Ht (Dynamic critical phenomena)

Ümüt Temizer, Ayşegül Özkılıç. Dynamic compensation temperature in kinetic spin-5/2 Ising model on hexagonal lattice[J]. 中国物理B, 2013, 22(3): 37501-037501.

Ümüt Temizer, Ayşegül Özkılıç. Dynamic compensation temperature in kinetic spin-5/2 Ising model on hexagonal lattice[J]. Chin. Phys. B, 2013, 22(3): 37501-037501.

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Dynamic compensation temperature in kinetic spin-5/2 Ising model on hexagonal lattice

Dynamic compensation temperature in kinetic spin-5/2 Ising model on hexagonal lattice

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