Monte Carlo simulations of ${\rm Ni Fe_2O_4}$ Nanoparticles

Details Monte Carlo simulations of ${\rm Ni Fe_2O_4}$ Nanoparticles Monte Carlo simulations of ${\rm Ni Fe_2O_4}$ Nanoparticles

2005-11-16

arxiv.org/abs/cond-mat/0511410v1

J. Appl. Phys. 99, 08H906, (2006)

Physics

Condensed Matter

Statistical Mechanics

Written for 50th MMM Conference, to be published in J. Appl. Phys

Scientific paper

10.1063/1.2172557

We use Monte Carlo simulations to study ${\rm Ni Fe_2O_4}$ nanoparticles. Finite size and surface effects differentiate them from their bulk counterparts. A continuous version of the Wang-Landau algorithm is used to calculate the joint density of states $g(M_z, E)$ efficiently. From $g(M_z, E)$, we obtain the Bragg-Williams free energy of the particle, and other physical quantities. The hysteresis is observed when the nanoparticles have both surface disorder and surface anisotropy. We found that the finite coercivity is the result of interplay between surface disorder and surface anisotropy. If the surface disorder is absent or the surface anisotropy is relatively weak, the nanoparticles often exhibit superparamagnetism.

Affiliated with

Also associated with

No associations

Rating

Monte Carlo simulations of ${\rm Ni Fe_2O_4}$ Nanoparticles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Monte Carlo simulations of ${\rm Ni Fe_2O_4}$ Nanoparticles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Monte Carlo simulations of ${\rm Ni Fe_2O_4}$ Nanoparticles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-588487