Table 2: Magnetic properties for composition of A-I, A-II and A-III, calcineds at 350 ℃/3h.
| Ferrite | Ms (Am2/Kg) | MR (Am2/Kg) | HC (T), Error. Max: ± 1.7 × 10-4 |
| A-I | 30.92 ± 2.82 | 5.57 ± 0.81 | 0.009 |
| A-II | 33.20 ± 2.97 | 4.09 ± 0.68 | 0.004 |
| A-III | 15.48 ± 1.82 | 2.95 ± 0.53 | 0.006 |