Monte Carlo simulation of magnetic multi-core nanoparticles
Artikel i vetenskaplig tidskrift, 2009

In this paper, a Monte Carlo simulation is carried out to evaluate the equilibrium magnetization of magnetic multi-core nanoparticles in a liquid and subjected to a static magnetic field. The particles contain a magnetic multi-core consisting of a cluster of magnetic single-domains of magnetite. We show that the magnetization of multi-core nanoparticles cannot be fully described by a Langevin model. Inter-domain dipolar interactions and domain magnetic anisotropy contribute to decrease the magnetization of the particles, whereas the single-domain size distribution yields an increase in magnetization. Also, we show that the interactions affect the effective magnetic moment of the multicore nanoparticles.

Magnetic dipolar interaction

Monte Carlo simulation

Magnetic anisotropy

Magnetic multi-core nanoparticle

Magnetization

Metropolis algorithm

Författare

Vincent Schaller

Chalmers, Teknisk fysik, Elektronikmaterial och system

Göran Wahnström

Chalmers, Teknisk fysik, Material- och ytteori

Anke Sanz-Velasco

Chalmers, Teknisk fysik, Elektronikmaterial och system

Peter Enoksson

Chalmers, Teknisk fysik, Elektronikmaterial och system

Christer Johansson

Journal of Magnetism and Magnetic Materials

0304-8853 (ISSN)

Vol. 321 10 1400-1403

Styrkeområden

Nanovetenskap och nanoteknik

Produktion

Livsvetenskaper och teknik

Ämneskategorier

Annan fysik

Den kondenserade materiens fysik

DOI

10.1016/j.jmmm.2009.02.047