Structure, Morphology, Cation Distribution and Magnetic Properties of Cr{sup 3+}-Substituted CoFe{sub 2}O{sub 4} Nanoparticles

Journal Article · Mon Apr 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4778-5· OSTI ID:22921334

Shinde, Vishnu S. ^[1]; Vinayak, Vitthal ^[2]; Jadhav, S. P.; Shinde, N. D. ^[1]; Humbe, Ashok V.

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1. Shri Chhatrapati Shivaji College, Department of Chemistry (India)
2. B.S.S. College, Department of Chemistry (India)

The present investigations deal with the effect of trivalent chromium ions (Cr{sup 3+}) on structural and magnetic properties of nanocrystalline cobalt ferrite (CoFe{sub 2}O{sub 4}) nanoparticles. The samples of CoCr{sub x}Fe{sub 2−x}O{sub 4} (where x = 0.0 to 1.0 in step of 0.2) were successfully synthesized by citric acid-assisted sol-gel auto combustion method. Further, the prepared samples were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (IR) and pulsed field hysteresis loop technique for structural, morphological and magnetic properties analysis, respectively. XRD patterns showed the formation of single-phase cubic spinel structure with broad Bragg’s peak for all the samples. The value of lattice parameter was found to be decreased with chromium substitution x. Cation distribution studies revealed that Co{sup 2+} and Fe{sup 3+} occupied both A and B sites, whereas Cr{sup 3+} ions occupied only B site. SEM analysis of the prepared samples confirmed the nanocrystalline nature of the material. The two absorption bands belonging to spinel structure were observed in IR spectra. Saturation magnetization (M{sub S}), remanence magnetization (M{sub r}) and coercivity (H{sub C}) was found to be decreased with increase in chromium substitution x.

• OSTI ID: 22921334
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 4 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
ABSORPTION SPECTROSCOPY
CHROMIUM ADDITIONS
COBALT COMPOUNDS
COERCIVE FORCE
DISTRIBUTION
FERRITES
HYSTERESIS
INFRARED SPECTRA
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETIZATION
NANOPARTICLES
NANOSTRUCTURES
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
SPINELS
X-RAY DIFFRACTION