Fig. 1: Physical measurements for Fe3O4 nanoparticles during up to 1071 days of oxidation.
From: Slow oxidation of magnetite nanoparticles elucidates the limits of the Verwey transition
a Magnetization curves as a function of temperature, with successive data offset by 3.0 emu/g. The magnetization was measured at H = 100 Oe. b C/T (C = heat capacity) with an offset of 0.1 J/mol/K2. c The normalized amplitude of the (440) XRD peak, \({I}^{{{{{{\rm{XRD}}}}}}}/{I}_{50{{{{{\rm{K}}}}}}}^{{{{{{\rm{XRD}}}}}}}\), offset by 0.1 units, determined from fits of a Gaussian function to the (440) peak. The error bars are defined as the standard deviation (SD) based on the fitting results of the XRD peak. d NMR spectra measured at T = 80 K with intensity \({I}^{{{{{{\rm{NMR}}}}}}}/{I}_{{{\max }}}^{{{{{{\rm{NMR}}}}}}}\) normalized to the maximum of each spectrum and offset by 0.3 units. Oxidation times in days are denoted on each plot.
