The effect of dipolar interactions in clusters of magnetic nanocrystals
Paper in proceedings, 2010

Monte Carlo simulations are carried out to evaluate the effective magnetic moment µeff of clusters containing 100 magnetic nanocrystals (MNCs) in a low magnetic field. The true value of the initial magnetic susceptibility, i.e. x0=∂M/∂H at zero field, can be assesed from µeff. Resuslts show that the dipolar interaction contribute to reduce the efeective magnetic moment. Below a threshold value near the low-field region, clusters of MNCs with smaller diameters possess a larger effective magnetic moment per unit volume compared to clusters with larger MNCs. This is of particular interest for bio-sensing systems relying on the magnetic responce of magnetic multi-core nanoparticles in the low-field region.

Author

Vincent Schaller

Chalmers, Applied Physics, Electronics Material and Systems Laboratory

Göran Wahnström

Chalmers, Applied Physics, Condensed Matter Physics

Anke Sanz-Velasco

Chalmers, Applied Physics, Electronics Material and Systems Laboratory

Peter Enoksson

Chalmers, Applied Physics, Electronics Material and Systems Laboratory

Christer Johansson

Imego AB - The Institute of Micro and Nanotechnology

Journal of Physics: Conference Series

1742-6588 (ISSN)

Vol. 200 SECTION 7

Areas of Advance

Transport

Production

Subject Categories

Other Engineering and Technologies

DOI

10.1088/1742-6596/200/7/072085

More information

Created

10/7/2017