| atmosphere | Calcined Temperature T (˚C) | Ms (emu/g) | Hc (Oe) | Mr (emu/g) | Crystallite size (nm) |
| N2 | 400 | 43.9 | 118.4 | 7.3 | 32.9 |
| 600 | 35.7 | 80.1 | 4.0 | 18.5 | |
| 800 | 27.1 | 58.4 | 2.2 | 26.0 | |
| 1000 | 80.3 | 135.1 | 11.4 | 52.8 | |
| 1200 | 87.2 | 123.6 | 9.8 | 81.6 | |
| CO2 + H2 | 600 | 73.1 | 195.3 | 14.1 | 31.7 |
| 800 | 90.9 | 175.7 | 17.2 | 33.5 | |
| 1000 | 90.8 | 128.1 | 9.0 | 63.4 | |
| 1100 | 180.2 | 128.6 | 18.9 | 68.1 | |
| 1200 | 92.6 | 126.1 | 9.0 | 69.3 |