Influence of Ni(2+) substitution on the structural, dielectric and magnetic properties of Cu-Cd ferrite nanoparticles

Nanoparticles with compositions of Cu(0.4-0.5x)Cd(0.2)Ni(0.4+x)Fe(2-0.5x)O(4) ( 0.0 less than or equal to x less than or equal to 0.5) successfully synthesized by a citrate-nitrate sol-gel auto combustion route. The combusted powder was calcinated at four hours in a furnace and then slowly cooled to...

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Bibliographic Details
Published in:Journal of alloys and compounds 2013-10, Vol.573, p.198-204
Main Authors: Hashim, Mohd, Shirsath, Sagar E, Kotnala, R K, Meena, Sher Singh, Kumar, Shalendra, Roy, Aashis, Jotania, R B, Bhatt, Pramod, Kumar, Ravi
Format: Article
Language:English
Subjects:
Copper
CURIE TEMPERATURE
DIELECTRIC CONSTANT
Dielectric properties
ELECTRICAL CONDUCTIVITY
FERRITE
Fourier transforms
Infrared spectroscopy
INSULATION (ELECTRICAL)
MAGNETIC PROPERTIES
Nanoparticles
PARTICLES
PROPERTIES
X RAYS
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Summary:Nanoparticles with compositions of Cu(0.4-0.5x)Cd(0.2)Ni(0.4+x)Fe(2-0.5x)O(4) ( 0.0 less than or equal to x less than or equal to 0.5) successfully synthesized by a citrate-nitrate sol-gel auto combustion route. The combusted powder was calcinated at four hours in a furnace and then slowly cooled to room temperature. The analysis methods of FTIR, XRD, FESEM, VSM and dielectric measurements were used to characterize prepared magnetic particles. The effect of Ni(2+) substitution on structural, magnetic and dielectric properties of Cu-Cd ferrite nanoparticles was studied. The comprehensive studies on compositional and frequency dependent dielectric properties were carried out by means of AC conductivity ( sigma (ac)), imaginary dielectric constant ( epsilon "). loss tangent (tan delta ), impedance and dielectric modulus (real and imaginary) measurements in frequency range of 50 Hz-5 MHz at room temperature. The structural properties investigated by using X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy. X-ray diffraction pattern and FTIR results revealed that synthesized samples are in single phase. It is observed that the dielectric constant ( epsilon ") and dielectric loss (tan delta ) value decreases with increase in Ni(2+) concentration (x). At low frequency the Maxwell type interfacial polarization was observed. Magnetization measurement shows that the Curie temperature of the samples increases with Ni(2+) concentration, which is explained by a change in the A-O-B super exchange interaction.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2013.03.029