Structural, dielectric and magnetic properties of nickel substituted cobalt ferrite nanoparticles: Effect of nickel concentration

Journal Article · Tue Sep 15 04:00:00 EDT 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4931908· OSTI ID:22492365

Velhal, Ninad B.; Patil, Narayan D.; Shelke, Abhijeet R.; Deshpande, Nishad G. ^[1]

---

1. q-Spin Tech and Nanomaterials laboratory, Department of Physics, Shivaji University, Kolhapur-416004 India (India)

Nickel substituted cobalt ferrite nanoparticles with composition Co{sub 1−x}Ni{sub x}Fe{sub 2}O{sub 4} (0.0 ≤ x ≤ 1.0) was synthesized using simple, low temperature auto combustion method. The X-ray diffraction patterns reveal the formation of cubic phase spinel structure. The crystallite size varies from 30-44 nm with the nickel content. Porous and agglomerated morphology of the bulk sample was displayed in the scanning electron microscopy. Micro Raman spectroscopy reveals continuous shift of E{sub g} and E{sub g}(2) stokes line up to 0.8 Ni substitution. The dispersion behavior of the dielectric constant with frequency and the semicircle nature of the impedance spectra show the cobalt nickel ferrite to have high resistance. The ferromagnetic nature is observed in all the samples, however, the maximum saturation magnetization was achieved by the 0.4 Ni substituted cobalt ferrite, which is up to the 92.87 emu/gm at 30K.

• OSTI ID: 22492365
• Journal Information: AIP Advances, Journal Name: AIP Advances Journal Issue: 9 Vol. 5; ISSN AAIDBI; ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT COMPOUNDS
CONCENTRATION RATIO
CUBIC LATTICES
DIELECTRIC MATERIALS
FERRITES
IMPEDANCE
MAGNETIC PROPERTIES
MAGNETIZATION
MORPHOLOGY
NANOPARTICLES
NICKEL COMPOUNDS
PERMITTIVITY
POROUS MATERIALS
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SPINELS
X-RAY DIFFRACTION