Tables at a glance

Table 1

Table 2

Figures at a glance

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Table 1

Ce3+ content -x	Ms (emu/g)	Hc+ (G)	Hc- (G)	Mr (emu/g)	Mr/ Ms
0.0	120	6434	-6515	95.5	0.791
0.03	105.5	7920	-7997	80.8	0.766
0.05	45.6	8139	-8529	33.2	0.737
0.1	97.7	8682	-8665	72.2	0.738

Table 1: Input parameters for surface tension (σ) [23]

Table 2

CoFe₂-xCexO₄
(Co_0.38Fe_0.62)[Co_0.62sub>Fe_1.33-xCe_x]O₄
Symmetry	F3dm
x	0.1	0.05	0.03	0
Lattice parameters
a (Å)	8.354(3)	8.353(3)	8.352(3)	8.350(3)
Bоnd-length
Fe1-O1	1.989(3)	2.002(4)	1.801(4)	1.986(2)
Fe2-O1	2.005(3)	1.998(3)	2.182(3)	1.999(3)
Fe1-O2	1.932(4)	1.936(3)	1.939(3)	1.949(3)
Fe2-O2	2.027(3)	2.031(4)	2.035(3)	2.045(4)
Atomic coordinates
O: x, y, z	0.256(2)	0.257(2)	0.256(3)	0.256(3)
Magnetic moment, M
((Fe1)2+(Co1)2)1/2 (mB)	3.56(3)	3.638(3)	3.790(3)	4.171(3)
((Fe2)2+(Co2)2)1/2 (mB)	1.54(3)	1.619(3)	1.668(3)	1.799(3)

Table 2: Input parameters for viscosity (η) [23]

FIGURE 1

Figure 1: X-ray diffraction patterns of CoFe2-xCexO4 measured at ambient conditions

FIGURE 2

Figure 2: Magnetic hysteresis M-H loops obtained at 100 K by applying an external magnetic field of ±20 kG for CoFe2-xCexO4

FIGURE 3

Figure 3: Dependences of the magnetization and coercivity on x for CoFe2-xCexO4 ferrite

FIGURE 4

Figure 4: Neutron diffraction patterns of CoFe2-xCexO4 measured at ambient conditions and refined by the Rietveld method. The experimental points and calculated profiles are shown. The ticks below represent the calculated positions of the structural peaks of cubic phase of studied ferrites. The magnetic reflections are labeled as «M». The cubic crystal structure of CoFe2-xCexO4 compounds of Fdm symmetry. The octahedra units are labeled by blue, the tetragonal units are green

FIGURE 5

Figure 5: The lattice parameter of CoFe2-xCexO4 ferrite as a function of cerium concentration. The solid line is linear approximation of experimental data. The Fe/Ce-O bond lengths of octahedral and tetrahedral units of the crystal structure of CoFe2-xCexO4 samples

FIGURE 6

Figure 6: The volume of the octahedral B and tetrahedral A units of the crystal structure of CoFe2-xCexO4 compounds as a function of cerium concentration. The experimental error does not exceed the size of the characters. The solid lines are linear approximation of experimental data

FIGURE 7

Figure 7: Dependence of the average magnetic moment on x for CoFe2-xCexO4 ferrite. The experimental error does not exceed the size of the characters. The solid lines are polynomial linear approximation second order of experimental data