Fig. 3From: Sn2+ Doping: A Strategy for Tuning of Fe3O4 Nanoparticles Magnetization Dipping Temperature/Amplitude, Irreversibility, and Curie PointTEM image and size distribution histogram of prepared Fe3O4 nanoparticles a, c before annealing and b, d after heating to 900 K (the red solid lines at c and d are the normal fitting)Back to article page