A6.3 - Magnetic relaxation imaging with a fluxgate sensor scanner

D. Ruehmer, E. Heim, A. Hirsch, R. Piel, T. Wawrzik, F. Ludwig & M. Schilling
Fluxgate sensors are among the most sensitive low noise sensors for the magnetic flux density B. We have developed a fluxgate scanner for the 2-dimensional magnetic relaxation imaging of magnetic nanoparticle distributions. In magnetorelaxometry (MRX), the magnetic moments of superparamagnetic nanoparticles are first aligned by an external magnetic field of the order of a few mT, and after switching off the magnetic field the decay of the net magnetic signal is measured. In our setup,...