Structural, magnetic and dielectric properties of pure and nickel-doped barium nanohexaferrites synthesized using chemical co-precipitation technique

Figures & data

Figure 1. XRD patterns presenting the phase of crystal structure of pure barium nanohexaferrites on varying the calcination conditions.

Figure 2. XRD patterns presenting the nickel-doped structure of pure barium nanohexaferrite with different values of nickel concentration.

Table 1. Size calculation of synthesized samples for calcination duration of 4 h using Debye–Scherrer equation

Sample name	Chemical composition	Calcination temperature (°C)	Size (nm)
Pure600	BaFe12O19	600	38.35
Pure800	BaFe12O19	800	51.88
Nidoped1	BaNi0.01Fe11.99O19	800	74.09
Ni-doped5	BaNi0.05Fe11.95O19	800	86.42
Ni-doped10	BaNi0.1Fe11.90O19	800	103.5

Figure 3. TEM results of pure barium nanohexaferrites.

Figure 4. TEM results of nickel-doped barium nanohexaferrites.

Figure 5. Hysteresis loop for pure barium nanohexaferrite calcined at 600°C.

Figure 6. Hysteresis loop for pure barium nanohexaferrite calcined at 800°C.

Figure 7. Hysteresis loop for nickel-doped barium nanohexaferrite calcined at 800°C.

Table 2. Magnetic parameters of pure and doped barium nanohexaferrite samples

Name of sample	Saturation magnetization (Ms) (emu/g)	Remanence (Hr) (emu/g)	Coercivity (Hc) (Oe)
Pure600	3.77	1.14	2046
Pure800	25.25	13.46	5004.24
Ni-doped1	29.12	14.96	4336.14

Figure 8. Real part of the relative permittivity of pure and nickel-doped barium nanohexaferrites as a function of logarithm of frequency.

Figure 9. Imaginary part of relative permittivity of pure and nickel-doped barium nanohexaferrites as a function of frequency.

Figure 10. Loss tangent of pure and nickel-doped barium nanohexaferrites as a function of frequency.

Figure 11. DC electrical resistance measurement of pure and nickel-doped barium nanohexaferrites using the two-probe method.