Question

15.11. (a) Calculate the spin-only magnetic moments of Ni2. Zn and Fe (b) Nickel ferrite (NiO. FeO,) and zinc ferrite (ZnO Fe O) have inverse and normal spinel structures. respectively. The two compounds form mixed ferrites. Assuming that the coupling between the ions is the same as in magnetite and that the orbital momenta are quenched, calculate the magnetic moment per formula unit for (Zno2Ni7O) Fe:O

Answer 1

a) The spin only magnetic moment is calculated from the number of unpaired electrons present the atom. If n = no. of unpaired electrons, then magnetic moment is calculated according to the formula M = $\sqrt{}${n(n+2)}.

Thus

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