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Copyright (c) 2016 Simone Colombo, Victor Lebedev, Zoran Dragan Grujic, Vladimir Dolgovskiy, Antoine Weis
This work is licensed under a Creative Commons Attribution 4.0 International License.
We show that a single atomic magnetometer in a magnetically unshielded environment can be used to perform magnetic particle spectroscopy (MPS) and AC susceptometry (ACS) on liquid-suspended magnetic nanoparticles. We demonstrate methods allowing a simultaneous recording of M(H) and dM/dH(H) dependences of samples containing down to 1 ?g of iron. Our results pave the way towards an atomic magnetometer based MPI scanner.