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Title: Influence of pH and fuels on the combustion synthesis, structural, morphological, electrical and magnetic properties of CoFe{sub 2}O{sub 4} nanoparticles

Nanocrystalline spinel cobalt ferrite particles are synthesized by simple combustion method using aspartic acid and glycine as fuels. The single phase cubic structure of CoFe{sub 2}O{sub 4} is revealed through X-ray diffraction analysis (XRD). Further the Rietveld refinement confirms the formation of inverse spinel structure of CoFe{sub 2}O{sub 4}. The characteristic functional groups of Co–O and Fe–O are identified from Fourier Transform Infrared (FT-IR) analysis. Uniform distribution of of nearly spherical particles with the size range of 40–80 nm is identified through field emission scanning electron microscope (FESEM) images. The calculated DC conductivity is 1.469 × 10{sup −7} and 2.214 × 10{sup −8} S cm{sup −1}, for CoFe{sub 2}O{sub 4} synthesized using aspartic acid and glycine, respectively. The dielectric behavior obeys the Maxwell–Wagner interfacial polarization. The ferromagnetic behavior of CoFe{sub 2}O{sub 4} is identified using VSM analysis and the calculated coercivity is 27 Oe and saturation magnetization is 68 emu/g.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4]
  1. Solid State Ionics and Energy Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore 641 046 (India)
  2. Department of Physics, Indian Institute of Technology, Kanpur 208016 (India)
  3. Semiconductor Electronics Department, Lviv Polytechnic National University, 12 Bandera Street, Lviv 79013 (Ukraine)
  4. Department of Physics, Alagappa Chettiar College of Engineering and Technology, Karaikudi 630 004 (India)
Publication Date:
OSTI Identifier:
22475998
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 71; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; COBALT COMPOUNDS; CRYSTAL STRUCTURE; CRYSTALS; DIELECTRIC MATERIALS; DISTRIBUTION; FERRITES; FOURIER TRANSFORMATION; GRAIN BOUNDARIES; INFRARED SPECTRA; MAGNETIC PROPERTIES; MAGNETIZATION; NANOPARTICLES; NANOSTRUCTURES; PH VALUE; SATURATION; SCANNING ELECTRON MICROSCOPY; SPINELS; SYNTHESIS; VIBRATING SAMPLE MAGNETOMETERS; X-RAY DIFFRACTION