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Title: Structural, optical, and magnetic properties of Mn and Fe-doped Co{sub 3}O{sub 4} nanoparticles

Mn and Fe-doped Co{sub 3}O{sub 4} nanoparticles were prepared by a simple precipitation method. The synthesized particles were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), UV-Vis absorption spectroscopy, Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and vibrating sample magnetometer (VSM) techniques. XRD analysis showed the cubic structure of Co{sub 3}O{sub 4}. SEM and TEM images confirmed the formation of interconnected nanoparticles. Mn and Fe-doped Co{sub 3}O{sub 4} showed broad absorption in the visible region compared to undoped sample and the band gap values are red shifted. Five Raman active modes were observed from the Raman spectra. FTIR spectra confirmed the spinel structure of Co{sub 3}O{sub 4} and the doping of Mn and Fe shifts the vibrational modes to lower wave number region. The magnetic measurements confirmed that Fe-doped Co{sub 3}O{sub 4} shows a little ferromagnetic behavior compared to undoped and Mn-doped Co{sub 3}O{sub 4}, which could be related to the uncompensated surface spins and the finite size effects.
Authors:
; ;  [1]
  1. School of Physics, Madurai Kamaraj University, Madurai – 625 021 (India)
Publication Date:
OSTI Identifier:
22492288
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 8; 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; ABSORPTION SPECTROSCOPY; COBALT OXIDES; COMPARATIVE EVALUATIONS; DOPED MATERIALS; FERROMAGNETISM; FOURIER TRANSFORMATION; INFRARED SPECTRA; IRON; MAGNETIC PROPERTIES; MANGANESE; NANOPARTICLES; PRECIPITATION; RAMAN SPECTRA; RAMAN SPECTROSCOPY; RED SHIFT; SCANNING ELECTRON MICROSCOPY; SURFACES; TRANSMISSION ELECTRON MICROSCOPY; VIBRATING SAMPLE MAGNETOMETERS; X-RAY DIFFRACTION