A comparative study of structural, electrical and magnetic properties of magnesium ferrite nanoparticles synthesised by sol-gel and co-precipitation techniques

Figures & data

Figure 1. XRD pattern of MgFe₂O₄ (S1) prepared by sol-gel method.

Figure 2. XRD pattern of MgFe₂O₄ (C1) prepared by co-precipitation method.

Table 1. Data on lattice parameter (a), crystalline size (D), X-ray density (ρ _x) of MgFe₂O₄ prepared using sol-gel and co-precipitation techniques

Sample	Lattice parameter, a (Å)	Crystallite size, D (nm)	X-ray density, ρ x (gm/cm^3)
S1	8.39	9.46	4.49
C1	8.38	12.14	4.50

Figure 3. FTIR spectra of MgFe₂O₄ samples S1 and C1.

Figure 4. Hysteresis loop of MgFe₂O₄ samples S1 and C1.

Table 2. Comparison of magnetic parameters of samples S1 and C1

Sample	M s (emu/g)	M r (emu/g)	H c (Oe)	R
S1	25.33	10.09	306.98	0.39
C1	4.34	0.12	371.43	0.03

Figure 5. Variation of dielectric constant (ε_r) of C1 with frequency at different temperatures.

Figure 6. Variation of dielectric constant (ε_r) of S1 of with frequency at different temperatures.

Figure 7. Variation of tanδ of C1 of with frequency at different temperatures.

Figure 8. Variation of tanδ of S1 of with frequency at different temperatures.

Figure 9. Variation of ac conductivity of C1 of with frequency at different temperature from 303 K to 363 K.

Figure 10. Variation of ac conductivity of C1 of with frequency at temperature from 383 K to 543 K.

Figure 11. Variation of a.c. conductivity of S1 of with frequency at different temperatures.