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Influence of preparation method on structural, optical and magnetic properties of nickel ferrite nanoparticles

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Scheme of synthesis of NiFe2O4 powders by (a) CSG route, (b) SGC route and (c) the Co-P route.
Scheme of synthesis of NiFe2O4 powders by (a) CSG route, (b) SGC route and (c) the Co-P route.

shows the XRD patterns of NiFe2O4 nanoparticles synthesized by (a) CSG, (b) SGC and (c) Co-P methods.
shows the XRD patterns of NiFe2O4 nanoparticles synthesized by (a) CSG, (b) SGC and (c) Co-P methods.

FT-IR spectra of NiFe2O4 nanoparticles synthesized by CSG, SGC and Co-P methods.
FT-IR spectra of NiFe2O4 nanoparticles synthesized by CSG, SGC and Co-P methods.

UV-Vis spectra of NiFe2O4 nanoparticles synthesized by (a) CSG, (b) SGC and (c) Co-P methods.
UV-Vis spectra of NiFe2O4 nanoparticles synthesized by (a) CSG, (b) SGC and (c) Co-P methods.

Hysteresis curves of NiFe2O4 nanoparticles synthesized by (a) CSG, (b) SGC, (c) Co-P methods and (d) normalized M-H loops at ±1500 Oe.
Hysteresis curves of NiFe2O4 nanoparticles synthesized by (a) CSG, (b) SGC, (c) Co-P methods and (d) normalized M-H loops at ±1500 Oe.

SEM images of NiFe2O4 nanoparticles synthesized by (a) sol-gel, (b) auto-combustion and (c) co-precipitation methods and calcined at 1000 °C.
SEM images of NiFe2O4 nanoparticles synthesized by (a) sol-gel, (b) auto-combustion and (c) co-precipitation methods and calcined at 1000 °C.

FT-IR frequency bands of NiFe2O4.

Synthesis routeIR frequency bands[cm−1]
ν1ν2
CSG580405
SGC592400
Co-P586401

Band gap and crystallite size of NiFe2O4.

Synthesis routeBand gap [eV]Crystallite size [nm]
CSG5.970.73
SGC5.226.71
Co-P5.835.35

Average particle size [nm] of NiFe2O4 nanoparticles determined fromXRD and magnetic properties observed at room temperature by VSM.

Preparation techniqueCrystallite size [nm]Saturation magnetization MS [emu/g]Remanence MR [emu/g]Coercivity HC [Oe]
CSG70.7336.618.25272.3
SGC26.713.66910.857230
Co-P35.3528.5811.341201

XRD analysis and magnetic characterization results of NiFe2O4 samples.

Preparation techniqueAnnealing temperature [°C]Crystallite size [nm]X-ray density [g/cc]Lattice constant [Å]
CSG100070.735.60498.2215
SGC100026.714.89748.3253
Co-P100035.355.39808.5998
eISSN:
2083-134X
Langue:
Anglais