Dielectric relaxation in CoFe sub(2-x)Y sub(x)O sub(4) (x=0.2, 0.4, 0.6) prepared by hydrothermal method

Yttrium substituted cobalt ferrite (CoFe sub(2-x)Y sub(x)O sub(4)) powders (x=0.2, 0.4 and 0.6) have been synthesized by hydrothermal method. X-ray diffraction has revealed the single phase formation of the compound with impurity phase formation at higher yttrium doping. Dielectric relaxations were...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2017-05, Vol.28 (9), p.6583-6591
Main Authors: Saikia, Kallol Kumar, Haque, Saif Ul, Murugesan, G, Kalainathan, S
Format: Article
Language:English
Subjects:
Dielectric relaxation
Doping
Electronics
Formations
Materials science
Oxygen
Vacancies
Yttrium
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Summary:Yttrium substituted cobalt ferrite (CoFe sub(2-x)Y sub(x)O sub(4)) powders (x=0.2, 0.4 and 0.6) have been synthesized by hydrothermal method. X-ray diffraction has revealed the single phase formation of the compound with impurity phase formation at higher yttrium doping. Dielectric relaxations were observed due to the presence of oxygen vacancies and Maxwell-Wagner effect. The activation energies calculated from the impedance spectra confirmed that oxygen vacancies were the causes for dielectric relaxation. Doping of yttrium has suppressed the magnetic saturation due to the decrease of Fe super(3+)-Fe super(3+) interactions.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-017-6348-1