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.


Vincent Schaller

Chalmers, Teknisk fysik, Elektronikmaterial

Göran Wahnström

Chalmers, Teknisk fysik, Kondenserade materiens fysik

Anke Sanz-Velasco

Chalmers, Teknisk fysik, Elektronikmaterial

Peter Enoksson

Chalmers, Teknisk fysik, Elektronikmaterial

Christer Johansson

Imego AB - The Institute of Micro and Nanotechnology

Journal of Physics: Conference Series

17426588 (ISSN) 17426596 (eISSN)

Vol. 200 SECTION 7 072085





Annan teknik



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