Table 7: The magnetic properties on co-doped Zn2+ and La3+ ions Fe3O4 nanopowders doped with different La3+ ion molar ratios synthesized via co-precipitation route under O2 atmosphere at room temperature.
| La3+ ions molar ratios | Magnetic properties | ||||
| Saturation magnetization Ms, (emu/g) | Retentivity Mr, (×10−3 emu/g) | Coercivity Hc, (Oe) | Remanence ratio, ×10−6 Mr/Ms | Magnetic moment per mole μB | |
| 0.00 | 32.872 | 78.459 | 3.8379 | 2.387 | 2.265 |
| 0.10 | 18.813 | 126.55 | 8.216 | 6.727 | 1.382 |
| 0.15 | 8.609 | 9.717 | 12.559 | 1.129 | 0.652 |
| 0.20 | 4.542 | 11.906 | 16.633 | 2.622 | 0.354 |
| 0.25 | 4.342 | 9.096 | 20.829 | 2.095 | 0.349 |
| 0.30 | 3.916 | 7.991 | 24.916 | 2.041 | 0.323 |