Magnetic hysteresis of individual NPs

Element-Specific Magnetic Hysteresis of Individual 18 nm Fe Nanocubes
Florian Kronast, Nina Friedenberger, Katharina Ollefs, Sebastian Gliga, Logane Tati-Bismaths, Ronja Thies, Andreas Ney, Ramona Weber, Christoph Hassel, Florian M. Romer, Anastasia V. Trunova, Christian Wirtz, Riccardo Hertel, Hermann A. Dürr, and Michael Farle 
Nano Lett. 11, 1710 (2011)

Magnetic imaging and spectromicroscopy of individual Fe
nanocubes in an applied magnetic field of up to 33 mT.