The effect of dipolar interactions in clusters of magnetic nanocrystals
Paper i proceeding, 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.

Författare

Vincent Schaller

Chalmers, Teknisk fysik, Elektronikmaterial och system

Göran Wahnström

Chalmers, Teknisk fysik, Kondenserade materiens fysik

Anke Sanz-Velasco

Chalmers, Teknisk fysik, Elektronikmaterial och system

Peter Enoksson

Chalmers, Teknisk fysik, Elektronikmaterial och system

Christer Johansson

Imego AB - The Institute of Micro and Nanotechnology

Journal of Physics: Conference Series

1742-6588 (ISSN)

Vol. 200 SECTION 7

Styrkeområden

Transport

Produktion

Ämneskategorier

Annan teknik

DOI

10.1088/1742-6596/200/7/072085

Mer information

Skapat

2017-10-07