Table 4. Values of Absorption Bands (υ1 and υ2) and Band Gap Energy for Ni0.4Cu0.3Zn0.3Fe2O4 Doped with the TiO2 Additive.
| absorption
bands cm–1 |
|||
|---|---|---|---|
| wt % TiO2 | υ1 | υ2 | Eg (eV) |
| 0 | 578.96 | 397.29 | 1.115 |
| 1 | 624.02 | 403.72 | 1.528 |
| 2 | 624.79 | 405.08 | 1.502 |
| 3 | 620.03 | 403.16 | 1.464 |
| 5 | 581.18 | 399.48 | 1.424 |
| 10 | 623.53 | 414.76 | 1.411 |