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Summary of the Keff evaluation of FePt NPs batches using a Stoner–Wohlfarth approach. Diameter d, the median effective magnetic anisotropy constant Keff and the peak value KL and KH for the two components are listed (details are given in the text).
| Diameter (nm) | 2.6 | 2.7 | 4.5 | 5.8 | 6.3 | 6.6 | 9.4 | 10.5 |
| Keff (MJ/m3) | 1.71 | 1.14 | 1.93 | 0.56 | 0.92 | 1.57 | 1.81 | 1.69 |
| KL (MJ/m3) | 0.15 | 0.11 | 0.10 | 0.10 | 0.11 | 0.10 | 0.10 | 0.10 |
| KH (MJ/m3) | 1.40 | 1.03 | 2.40 | 0.75 | 1.50 | 1.90 | 1.90 | 1.80 |
