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

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.
Authors:
; ;  [1] ; ;  [2]
  1. Thick and Thin Film Device Laboratory, Department of Physics, Shivaji University, Kolhapur-416004 India (India)
  2. q-Spin Tech and Nanomaterials laboratory, Department of Physics, Shivaji University, Kolhapur-416004 India (India)
Publication Date:
OSTI Identifier:
22492365
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 9; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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