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

Journal Article · Sat Aug 15 00:00:00 EDT 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4928218· OSTI ID:22492288

Soundararajan, N.; Ramachandran, K. ^[1]

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1. School of Physics, Madurai Kamaraj University, Madurai – 625 021 (India)

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.

• OSTI ID: 22492288
• Journal Information: AIP Advances, Vol. 5, Issue 8; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

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