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

Year 2018, Volume: 6 Issue: 2, 72 - 80, 03.08.2018

Erol Vatansever

https://doi.org/10.21541/apjes.350170

Cited By: 1

Abstract

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. 

Keywords

Cylindrical nanowire, Propagating Magnetic Field, Monte Carlo Simulation

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

Abstract

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.

Keywords

Cylindrical nanowire, propagating magnetic field, Monte Carlo simulation

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