Fig. 5From: Sn2+ Doping: A Strategy for Tuning of Fe3O4 Nanoparticles Magnetization Dipping Temperature/Amplitude, Irreversibility, and Curie Pointa Deconvoluted high-resolution XPS spectra of Fe 2p3/2 recorded from pristine Fe3O4 sample before and after heating to 900 K (red, Fe3+; blue, Fe2+; magenta, Fe metallic tail). b FTIR spectra (transmission vs. wavenumbers) of Fe3O4 nanoparticles before and after heating to 900 KBack to article page