Magnetization Switching in Nanowires: Monte Carlo Study with Fast Fourier Transformation for Dipolar Fields

Abstract

For the investigations of thermally activated magnetization reversal in systems of classical magnetic moments numerical methods are desirable. We present numerical studies which base on time quantified Monte Carlo methods where the long-range dipole-dipole interaction is calculated with the aid of fast Fourier transformation. As an example, we study models for ferromagnetic nanowires comparing our numerical results for the characteristic time of the reversal process also with numerical data from Langevin dynamics simulations where the fast Fourier transformation method is well established. Depending on the system geometry different reversal mechanism occur like coherent rotation, nucleation, and curling.

7 pages, 5 figures, submitted to J. Magn. Magn. Mat

References in corpus (4)

• Monte Carlo simulation with time step quantification in terms of Langevin dynamics
• Magnetization switching in a Heisenberg model for small ferromagnetic particles
• Nucleation and hysteresis in Ising model: Classical theory versus computer simulation
• Magnetization Switching in Small Ferromagnetic Particles: Nucleation and Coherent Rotation

Cited by in corpus (22)

• Reversal modes in magnetic nanotubes
• Domain wall mobility in nanowires: transverse versus vortex walls
• Magnetic nanowires and nanotubes
• Dynamic phase transition properties and hysteretic behavior of a ferrimagnetic core-shell nanoparticle in the presence of a time dependent magnetic field
• Multiscale modeling of ultrafast element-specific magnetization dynamics of ferromagnetic alloys
• Fidimag -- a finite difference atomistic and micromagnetic simulation package
• Brownian dynamics approach to interacting magnetic moments
• Study on Effects of Dipole-dipole Interactions in Nd_2Fe_{14}B thin film Based on Stochastic Cut-off Method with New Efficient Algorithm
• Magnetization dynamics of two interacting spins in an external magnetic field
• Reduced thermal stability of antiferromagnetic nanostructures
• Mechanism for nonequilibrium symmetry breaking and pattern formation in magnetic films
• Magnetization reversal in isolated and interacting single-domain nanoparticles
• Magnetization dynamics of a CrO${}_2$ grain studied by micro-Hall magnetometry
• Nucleation in the Ising ferromagnet by a field spatially spreading in time
• Monte Carlo study of the exchange bias effect in Co/CoO core-shell nanowires
• Exchange bias effect in cylindrical nanowires with ferromagnetic core and polycrystalline antiferromagnetic shell
• Magnetic properties of nanowires with ferromagnetic core and antiferromagnetic shell
• Simulation of Magnetization Switching in Nanoparticle Systems
• Externally-driven transformations of vortex textures in flat submicrometer magnets
• Dipolar-controlled spin tunneling and relaxation in molecular magnets
• The magnetic reversal in dot arrays recognized by the self-organized adaptive neural network
• Role of temperature-dependent spin model parameters in ultra-fast magnetization dynamics