Figure 6
(a) Measured molar susceptibility (χmol) vs. temperature (T) for a powdered sample (points) fitted to eq. 7 (line). Fit parameters are given in the text. (b) 1/χmol vs. T and the inverse of the fit from panel (a) is plotted for comparison. (c) χmolT vs. T indicates a small temperature independent paramagnetic component to the measurement, evidenced as a positive gradient at room temperature. The significant decrease in the product χmolT below approximately 15 K is indicative of the onset of single-ion anisotropy at low temperatures in the powdered sample.
