SciELO - Scientific Electronic Library Online

 
vol.82 issue194Comparison of consistency assessment models for isolated horizontal curves in two-lane rural highwaysBroad-Range tunable optical wavelength converter for next generation optical superchannels author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


DYNA

Print version ISSN 0012-7353

Abstract

LONDONO-NAVARRO, Juanita; RIANO-ROJAS, Juan Carlos  and  RESTREPO-PARRA, Elisabeth. Competition between anisotropy and dipolar interaction in multicore nanoparticles: Monte Carlo simulation. Dyna rev.fac.nac.minas [online]. 2015, vol.82, n.194, pp.66-71. ISSN 0012-7353.  https://doi.org/10.15446/dyna.v82n194.44297.

Monte Carlo simulations combined with the Heisenberg model and Metropolis algorithm were used to study the equilibrium magnetic properties of magnetic multi-core nanoparticles of magnetite. Three effects were considered in this simulation: the Zeeman effect, magneto crystalline anisotropy, and dipolar interaction. Moreover, the influence of the size distribution (mean diameter and standard deviation) on the magnetization was analyzed. As an important result, a reduction of the equilibrium magnetization caused by the dipolar interaction and the magneto crystalline anisotropy was observed. On the other hand, the nanoparticle size increase produces an enhancement in the equilibrium magnetization, because of the lower influence of dipolar interaction. Cooling temperature effect was also observed, presenting a decrease in the equilibrium magnetization as the temperature was increased. The influence of the easy axis direction was studied.

Keywords : Magnetic multi-core nanoparticle; Monte Carlo; Magnetic dipolar interaction; Magneto crystalline anisotropy.

        · abstract in Spanish     · text in English     · English ( pdf )