In order to understand the results from the different analysis methods we have to build magnetic models of the magnetic particle systems. In many cases, e.g., applying the Langevin function to explain static M-H curves and using the moment superposition model (MSM) for the calculation of magnetorelaxometry and AC susceptibility measurements, interactions between individual magnetic nanoparticles are neglected. However, for suspensions with comparably large nanoparticle concentrations, for particles with large magnetic moments and this shells, and in the case of multi-core particles where there are large magnetic interactions between the single-domain crystals that build up the particle, these interactions must be taken into account in the different analysis. Especially with regard to Magnetic Particle Spectroscopy (MPS) and Magnetic Particle Imaging (MPI) where AC magnetic fields with large amplitudes are applied, accurate models are still lacking. We will use for instance Monte Carlo methods in order to take into account the effects of magnetic interactions, size distribution and magnetic anisotropy on the magnetization response.

Project Partners

Project partners


	This project has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n° 604448