Journal ArticleDOI
Structural and electrical properties of Zn1-xNixFe2O4 ferrite
TLDR
In this article, the phase purity, homogeneity, lattice structure and cell parameters of the Zn 1− x Ni x Fe 2 O 4 was checked by XRD technique using conductance spectroscopy.Abstract:
The phase purity, the homogeneity, lattice structure and cell parameters of the Zn 1− x Ni x Fe 2 O 4 was checked by XRD technique. The Ni doping effects on the electrical properties in Zn 1− x Ni x Fe 2 O 4 was investigated using conductance spectroscopy. When introducing nickel in Zn ferrite, the conductivity of the material increases. This effect disappears at high temperature ( T >600 K). The conductivity spectra can be splitted in three regions. In the first one, the conductivity is frequency independent. In the second region, the conductivity can be described by the ω n law. It decreases with increasing frequency in the third region. DC conductivity analysis proves that electronic conduction was dominated by thermally activated Hopping of Small Polaron (SPH) at high temperature and Variable Range Hopping (VRH) at low temperature. For T > T s , where T s is the temperature at which appears a change in the slope of σ dc T (1000/ T ) curves, the activation energy decreases when increasing Ni content (from E a =665 meV for x =0 to E a =283 for x =0.5). For a ll Ni compositions, the activation energy is equal to 280 meV when temperature is lower than T s . From AC-conductivity study, it is found that activation energy decreases with increasing Ni concentration and varies significantly when increasing frequency. Also, the variation of the exponent “ n ” confirms that hopping model is the dominating mechanism in the system.read more
Citations
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Journal ArticleDOI
Synthesis and investigation of structural, morphological, magnetic, dielectric and impedance spectroscopic characteristics of Ni-Zn ferrite nanoparticles
Shahid Atiq,Maria Majeed,Aqsa Ahmad,S. Kumail Abbas,Murtaza Saleem,Saira Riaz,Shahzad Naseem +6 more
TL;DR: In this paper, a series of ferrite samples with general formula Ni1−xZnxFe2O4 (x=0.0, 0.2,0.4, 0.,6, 0,8 and 1.0) synthesized using sol-gel self-assisted combustion method have been investigated.
Journal ArticleDOI
Investigation of the structural, optical, elastic and electrical properties of spinel LiZn2Fe3O8 nanoparticles annealed at two distinct temperatures
D. Bouokkeze,J. Massoudi,W. Hzez,M. Smari,Amira Bougoffa,Kamel Khirouni,E. Dhahri,Lotfi Bessais +7 more
TL;DR: In this article, the spinel structure of Ni0.5ZnFe1.5O4 (LiZn2Fe3O8) was obtained by a sol-gel auto-combustion method at two different annealing temperatures.
Journal ArticleDOI
Conductivity and giant permittivity study of Zn0.5Ni0.5Fe2O4 spinel ferrite as a function of frequency and temperature
TL;DR: In this paper, the dielectric properties of spinel ferrites were investigated in the frequency range 50 Hz-10 MHz and in the temperature range 300-420 K. The impedance plots displayed both intra- and inter-granular contributions.
Journal ArticleDOI
Structural, elastic, optical and dielectric properties of Li0.5Fe2.5 O4 nanopowders with different particle sizes
TL;DR: LiFe5O8 (Li0.5O4) nanopowders were synthesized by the sol-gel auto-combustion method and were annealed at different temperatures of 500, 600, 700, and 1100 ǫ as discussed by the authors.
Journal ArticleDOI
Structural, morphological, Raman and ac electrical properties of the multiferroic sol-gel made Bi0.8Er0.1Ba0.1Fe0.96Cr0.02Co0.02O3 material
A. Benali,A. Benali,B.M.G. Melo,P. R. Prezas,M. Bejar,E. Dhahri,M.A. Valente,M.P.F. Graça,Bernardo A. Nogueira,Benilde F.O. Costa +9 more
TL;DR: In this paper, the effect of multi-doping in A and B site of the multiferroic prepared by the Sol-gel method Bi0.8Er0.1Ba 0.1Fe 0.96Co0.02O3 (BEBFCC) on the structural, morphological and electric properties was investigated.
References
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Journal ArticleDOI
Temperature dependence of electrical properties of nickel–zinc ferrites processed by the citrate precursor technique
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