Comparison of structural and electrical properties of Co{sup 2+}doped Mn-Zn soft nano ferrites prepared via coprecipitation and hydrothermal methods
- Thermal Transport Laboratory, Materials Engineering Department, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology, H-12, Islamabad (Pakistan)
- Centre for Emerging Sciences, Engineering and Technology (CESET), I-10/3, Islamabad (Pakistan)
Graphical abstract: - Highlights: • Coprecipitation and hydrothermal synthesis of Co{sup 2+} doped Mn-Zn ferrites. • Dielectric measurements at 3 MHz and 1 GHz frequencies. • Enhanced DC electrical resistivity for samples prepared from hydrothermal technique. • Impedance studies for the prepared samples showing major contribution due to grains. - Abstract: A series of Co doped Mn-Zn ferrites compounds with the formula Mn{sub 0.5}Zn{sub 0.5−x}Co{sub x}Fe{sub 2}O{sub 4} (x = 0, 0.15, 0.25, 0.35 and 0.50) were successfully synthesized by polyethylene glycol-assisted coprecipitation and hydrothermal methods. The structural characterization of the samples was done using X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR). All the samples found to have cubic spinel structure. The average crystallite size of all nanoparticles were estimated using Scherrer's formula and found to lie between 10 and 25 ± 3 nm with small size distribution of particles prepared by hydrothermal method. The FTIR spectrum showed two absorption bands of tetrahedral and octahedral metal-oxygen sites. DC electrical resistivity varied from 4.12 × 10{sup 7} to 8.32 × 10{sup 10} ohm cm with cobalt doping. The dielectric measurements were performed from 20 Hz to 3 MHz and from 1 MHz to 1 GHz frequency ranges. The value of dielectric constant (ε′) varies from 15.54 to 106.25 (1 MHz) and 6.73–16.48 (1 GHz) for all the samples at room temperature. Impedance spectroscopy was carried out from 20 Hz to 3 MHz, at room temperature to study the grains and grain boundaries effect.
- OSTI ID:
- 22341852
- Journal Information:
- Materials Research Bulletin, Vol. 49; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comparative study of NiFe{sub 2−x}Al{sub x}O{sub 4} ferrite nanoparticles synthesized by chemical co-precipitation and sol–gel combustion techniques
Effect of Preparation Conditions on the Structure and Magnetic Properties of Metal-Doped Magnesium Ferrites Synthesized From Laterite Leaching Solutions
Related Subjects
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
ATOMIC FORCE MICROSCOPY
COBALT IONS
DIELECTRIC MATERIALS
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
FERRITE
FERRITES
FOURIER TRANSFORM SPECTROMETERS
FOURIER TRANSFORMATION
GRAIN BOUNDARIES
HYDROTHERMAL SYNTHESIS
INFRARED SPECTRA
MHZ RANGE
NANOPARTICLES
PERMITTIVITY
POLYETHYLENE GLYCOLS
SCANNING ELECTRON MICROSCOPY
SPECTROSCOPY
X-RAY DIFFRACTION