Synthesis and Characterization of Nickel-Substituted Cobalt Ferrite Nanoparticles Using Sol–Gel Auto-combustion Method

Journal Article · Sat Jun 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4867-5· OSTI ID:22921240

Kumar, Gangothri S.; Raguram, T.

In the present work, Co{sub 1−x}Ni{sub x}Fe{sub 2}O{sub 4} (x = 0.02, 0.04, and 0.06 M) is prepared by sol–gel auto-combustion method and its structural, functional, magnetic, and morphological characteristics are analyzed. The peaks corresponding to the plane observed from XRD matches with JCPDS data of CoFe{sub 2}O{sub 4} (22-1086) and NiFe{sub 2}O{sub 4} (10-0325). It is noted that the average crystallite size decreases from 31 to 27 nm when the nickel concentration increases from 0.02 to 0.06 M, indicative of the incorporation of Ni{sup 2+} ion in the cobalt ferrite lattice. FTIR analysis shows the presence of M↔O vibration at the tetrahedral and octahedral sites. Micro - Raman spectroscopy shows the stretching vibrations at 486.87 cm{sup − 1} (E{sub g}) and 696.96 cm{sup − 1} (A{sub 1g}), which are the characteristic vibrations of spinel ferrites. Magnetic studies show the variation in saturation magnetization (M{sub S} = 20.25, 9.41, 18.5 emu/g.) and coercivity (H{sub C} = 746.06, 953.03, 885.59 Oe) when the concentration of Ni{sup 2+} ion increases from 0.02 to 0.06 M. The prepared nanoparticles show a ferromagnetic nature which is attributed to the creation of an antiparallel spin and the magnetic moment created by the cation at tetrahedral and octahedral sites. The surface morphology of samples is imaged by a field emission scanning electron microscope.

• OSTI ID: 22921240
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 6 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
COBALT COMPOUNDS
COERCIVE FORCE
COMBUSTION
FERRITES
FIELD EMISSION
FOURIER TRANSFORMATION
INFRARED SPECTRA
MAGNETIC MOMENTS
MAGNETIZATION
NANOPARTICLES
NICKEL ADDITIONS
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
SPINELS
SYNTHESIS
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION