Table 2.
Room temperature coercive field (Hc), remnant magnetization (Mr) and saturation magnetization (Ms) of graphene samples the values in parenthesis were obtained at 5 K; (θp) is the Curie–Weiss temperature.
| Sample | Hc (Oe) | Mr (emu g−1) | Ms (emu g−1) | θp FC (500 Oe) |
|---|---|---|---|---|
| RGO | 185 (78) | 0.001 (0.0031) | 0.003 (0.71) | 106 K |
| (agglomerate) | ||||
| EG | 139 (213) | 0.003 (0.0055) | 0.01 (0.07) | -1454 K |
| EG-H | 155 (109) | 0.001 (0.0063) | 0.004 (1.29) | -100 K |
| EG-Ha | 145 (214) | 0.001 (0.004) | 0.002 (0.25) | – |
| EG-H (w)b | 80 (96) | 0.002 (0.006) | 0.009 (1.35) | -756 K |
| DG-1650 | 41 (136) | 0.002 (0.007) | 0.04 (0.13) | 235 K |
| DG-2200 | 200 (213) | 0.001 (0.003) | 0.002 (0.05) | -75 K |
| HG | 23 | 0.05 (0.036) | 0.32 (0.54) | -4178 K |
aReduced with ethylene glycol.
bWashed with 8-hydroxy-quinoline-5-sulfonic acid.