Coercivity reduction in a two-dimensional array of nanoparticles
arXiv:1406.7786 · doi:10.1140/epjb/e2014-50311-2
Abstract
We report on theoretical investigation of the magnetization reversal in two-dimensional arrays of ferromagnetic nano-particles with parameters of cobalt. The system was optimized for achieving the lowest coercivity in an array of particles located in the nodes of triangular, hexagonal and square grids. Based on the numerical solution of the non-stochastic Landau-Lifshitz-Gilbert equation we show that each particle distribution type is characterized with a proper optimal distance, allowing to lower the coercivity values for approximately 30% compared with the reference value obtained for a single nano-particle. It was shown that the reduction of coercivity occurs even if the particle position in the array is not very precise. In particular, the triangular particle arrangement maintained the same optimal distance between the particles under up to 20% random displacements of their position within the array.
arXiv comment7 pages, 5 figures
References in corpus (8)
- Spintronics: Fundamentals and applications
- Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
- Thermal fluctuations of magnetic nanoparticles
- Macrospin Models of Spin Transfer Dynamics
- Current Induced Magnetization Switching in Small Domains of Different Anisotropies
- Harmonic oscillator model for current- and field-driven magnetic vortices
- Analysis of the Collective Behavior of a 10 by 10 Array of Fe3O4 Dots in a Large Micromagnetic Simulation
- Parameter dependence of resonant spin torque magnetization reversal