Structural, optical, and magnetic properties of Mn and Fe-doped Co3O4 nanoparticles

Mn and Fe-doped Co3O4 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 spectros...

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Bibliographic Details
Published in:AIP advances 2015-08, Vol.5 (8), p.087104-087104-10
Main Authors: Stella, C., Soundararajan, N., Ramachandran, K.
Format: Article
Language:English
Subjects:
Cobalt oxides
Electron microscopes
Ferromagnetism
Fourier transforms
Infrared spectroscopy
Iron
Magnetic measurement
Magnetic properties
Manganese
Nanoparticles
Optical properties
Raman spectra
Raman spectroscopy
Scanning electron microscopy
Size effects
Spectrum analysis
Transmission electron microscopy
X-ray diffraction
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Summary:Mn and Fe-doped Co3O4 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 Co3O4. SEM and TEM images confirmed the formation of interconnected nanoparticles. Mn and Fe-doped Co3O4 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 Co3O4 and the doping of Mn and Fe shifts the vibrational modes to lower wave number region. The magnetic measurements confirmed that Fe-doped Co3O4 shows a little ferromagnetic behavior compared to undoped and Mn-doped Co3O4, which could be related to the uncompensated surface spins and the finite size effects.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4928218