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(a) Thermomagnetic data with best fit from MFT approximation for the 50 nm sample. Data were collected under the application of a 1000 Oe magnetic field. (b) The Néel temperatures determined by MFT fitting of thermomagnetic data plotted against average NP diameters. The inset is a plot of the Néel temperatures as a function of lattice parameter.
(a) Real part of the Fourier transformed Fe and Mn edge EXAFS data with best fit data for 7.5 nm diameter Mn-ferrite NP sample. (b) Fe edge XANES data with best linear combination fit for the same sample.
Néel temperature vs inversion parameter as described by and molar concentration of NaOH solution used in chemical processing of NPs. Error bars, plotted on the inversion parameters and Néel temperatures, reflect the uncertainty in the measurements and modeling analyses. The measured particle diameters for each sample are denoted aside each data point.
Short-range structure properties determined from EXAFS analyses of Mn-ferrite NP samples. The uncertainty in the least significant digit is included in parenthesis.
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