Optical, X-Ray Diffraction, and Magnetic Properties of the Cobalt-Substituted Nickel Chromium Ferrites (CrCo_𝑥Ni_1−𝑥FeO₄, 𝑥=0,0.2,0.4,0.6,0.8,1.0) Synthesized Using Sol-Gel Autocombustion Method

Table 2

Cation distribution for CrCo_𝑥Ni_1−𝑥FeO₄ annealed at 1000°C.

Ferrites Composition	Observed magnetic moment, (nB)	Cation distribution	Calculated magnetic moment
CrNiFeO4	0.18	(Fe0.8Cr0.2)^A[NiCr0.8Fe0.2]^BO4	0.20
CrNi0.8Co0.2FeO4	0.40	(Fe0.95Co0.05)^A[CrNi0.8Co0.15Fe0.05]^BO4	0.40
CrNi0.6Co0.4FeO4	0.62	(Fe0.95Co0.05)^A[CrNi0.6Co0.35Fe0.05]^BO4	0.60
CrNi0.4Co0.6FeO4	0.73	(Fe0.97Co0.03)^A[CrNi0.4Co0.57Fe0.03]^BO4	0.72
CrNi0.2Co0.8FeO4	0.82	(Fe0.99Co0.01)^A[CrNi0.2Co0.79Fe0.01]^BO4	0.84
CrCoFeO4	0.58	(Fe)^A[CoCr]^BO4	1.00