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The underlying physics of magnetic nanoparticles

Kolloquium der Abteilung 8

Several biomedical applications make use of magnetic nanoparticles because their large magnetic moment allows to detect them from a distance. This property is used in e.g. magnetorelaxometry, where the relaxing magnetic signal is used to reconstruct the spatial distribution of nanoparticles. In this presentation we will have a look at the underlying physics, called micromagnetism, describing the magnetic dynamics of these nanoparticles. This low-level model can be used to gain insight in complex systems. For example, we investigated the relaxation properties of interacting nanoparticles using our in-house developed software package, Vinamax. Finally, a short introduction is given about the micromagnetic systems I usually work on, i.e. magnetic domain wall motion in nanowires.