Standing magnetic wave on Ising ferromagnet: Nonequilibrium phase transition

Halder, Ajay; Acharyya, Muktish

doi:10.1016/j.jmmm.2016.07.062

Cited by 8 publications

(10 citation statements)

References 31 publications

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“…6 of Ref. [40] with the Fig. 5 of the present study, it is possible to underline that when value of the wavelength is increased, dynamic phase transition temperature tends to shift to the upper transition regions.…”

Section: Resultssupporting

confidence: 79%

“…Even though there exists a clear difference between Ref. [40] and the current study, it may possible to compare the obtained phase diagrams. By comparing the Fig.…”

Section: Resultsmentioning

confidence: 71%

“…Note that in Ref. [40], the authors have studied the standing magnetic field effects on the spin-1/2 Ising model using Monte-Carlo simulations. They have also plotted the phase diagram in dynamic transition temperature and field amplitude for varying values of the wavelength.…”

Section: Resultsmentioning

confidence: 99%

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Dynamic phase transition features of the cylindrical nanowire driven by a propagating magnetic field

Vatansever¹

2018

Academic Platform Journal of Engineering and Science

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Magnetic response of the spin-1/2 cylindrical nanowire to the propagating magnetic field wave has been investigated by means of Monte Carlo simulation method based on Metropolis algorithm. The obtained microscopic spin configurations suggest that the studied system exhibits two types of dynamical phases depending on the considered values of system parameters: Coherent propagation of spin bands and spin-frozen or pinned phases, as in the case of the conventional bulk systems under the influence of a propagating magnetic field. By benefiting from the temperature dependencies of variances of dynamic order parameter, internal energy and the derivative of dynamic order parameter of the system, dynamic phase diagrams are also obtained in related planes for varying values of the wavelength of the propagating magnetic field. Our simulation results demonstrate that as the strength of the field amplitude is increased, the phase transition points tend to shift to the relatively lower temperature regions. Moreover, it has been observed that dynamic phase boundary line shrinks inward when the value of wavelength of the external field decreases.

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Section: Resultssupporting

confidence: 79%

“…Even though there exists a clear difference between Ref. [40] and the current study, it may possible to compare the obtained phase diagrams. By comparing the Fig.…”

Section: Resultsmentioning

confidence: 71%

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Dynamic phase transition features of the cylindrical nanowire driven by a propagating magnetic field

Vatansever¹

2018

Academic Platform Journal of Engineering and Science

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“…The nonequilibrium dynamic transition is found and comprehensive phase boundary was obtained. In the case of standing magnetic wave [9], standing spin band modes (in the high temperature) are observed. The similar studies are performed with standing magnetic wave [10] in random field Ising ferromagnet and the exact mathematical form of the phase boundary is found, the breathing and spreading transitions are found in Ising ferromagnet driven by spherical magnetic wave [11], the dynamic transitions are studied in Blume-Capel model [12] driven by propagating and standing magnetic wave.…”

Section: Introductionmentioning

confidence: 99%

Driven spin wave modes in XY ferromagnet: non-equilibrium phase transition

Acharyya

2018

Phase Transitions

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The dynamical responses of XY ferromagnet driven by linearly polarised propagating and standing magnetic field wave have been studied by Monte Carlo simulation in three dimensions. In the case of propagating magnetic field wave (with specified amplitude, frequency and the wavelength), the low temperature dynamical mode is a propagating spin wave and the system becomes structureless (or random) in the high temperature. A dynamical symmetry breaking phase transition is observed at a finite (nonzero) temperature. This symmetry breaking is confirmed by studying the statistical distribution of the angle of the spin vector. The dynamic nonequilibrium transition temperature was found to decrease as the amplitude of the propagating magnetic field wave increased. A comprehensive phase boundary is drawn in the plane formed by temperature and amplitude of propagating field wave. The phase boundary was observed to shrink (in the low temperature side) for longer wavelength of the propagating magnetic wave. In the case of standing magnetic field wave, the low temperature excitation is a standing spin wave which becomes structureless (or random) in the high temperature. Here also, like the case of propagating magnetic wave, a dynamical symmetry breaking nonequilibrium phase transition was observed. A comprehensive phase boundary was drawn. Unlike the case of propagating magnetic wave, the phase boundary does not show any systematic variation with the wavelength of the standing magnetic field wave. In the limit of vanishingly small amplitude of the field, the phase boundaries approach the recent Monte Carlo estimate of equilibrium transition temperature. I. Introduction:The nonequilibrium responses of Ising ferromagnet to an oscillating (in time but uniform over the space) magnetic field is an interesting field of modern research [1,2]. The nonequilibrium phase transition is one major focus of the investigation. Some important studies may be reported below. The existence of the growth of correlation near the transition was reported [3]. The bulk and surface critical behaviours were studied recently[4] and those are found to belong to different universality class. The anomalous metamagnetic fluctuations near the transition were studied recently [5]. This study was supported by Monte Carlo simulation [6]. Experimentally, a notable transient behaviour was found [7], in the uniaxial cobalt film, for the time period of the field which is faster than a critical time. This is related to the the existence of first order transition. All these studies, mentioned above, are signatures of the current interest in the field of nonequilibrium responses of ferromagnets driven by time varying external magnetic field.One common and important feature of the above mentioned studies, is the time dependence of the external magnetic field, which keeps the system far away from the equilibrium. However, recently the interests have been taken in the case, where the driving magnetic field has both spatial and temporal variations. This spatio-temporal vari...

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“…Besides, effect of the polarized electromagnetic wave [29] and field which have gradient [30] inspected by the same methods. Other examples of this category are, standing wave [31] and propagating wave type of fields [32,33]. Indeed dynamical spin system under the different type of fields deserves more attention, due to the rich dynamical behavior and possible experimental applications.…”

Section: Introductionmentioning

confidence: 99%