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Magnetic properties of bare, modified and oxidized magnetite NPs.
| Sample | Saturation Magnetization Ms, emu/g | Remanent Magnetization Mr, emu/g | Coercive Force Hc, Oe |
|---|---|---|---|
| Fe3O4 (bare) | 68.2 | 6.88 | 74.1 |
| Fe3O4/HA | 30.9 | 6.40 | 160 |
| Fe3O4/HAox (harsh oxidation) | 15.7 | 4.11 | 159 |
HA—humic acids, ox—oxidized.
