Structure and magnetization studies of Ti-substituted Ni0.3 Zn0.7Fe2O4

Khan, D. C.; Misra, M.; Das, Amit

doi:10.1063/1.330944

Cited by 66 publications

(22 citation statements)

References 2 publications

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“…3c. The obtained result of δ(A) < δ(B) in the well-ordered spectra is in agreement with other previously reported data [38][39][40]. This could be interpreted as being due to the large band separation of Fe 3+ -O 2-for the octahedral ions compared with that for the tetrahedral ions.…”

Section: Isomer Shiftsupporting

confidence: 92%

Cation distribution, hyperfine parameters and conduction mechanism in the ferrimagnetic system Cu_0.5Co_0.5Ga_xFe_2–_xO₄

Ata‐Allah

Kaiser

2005

Physica Status Solidi (b)

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Compositions having the chemical formula Cu 0.5 Co 0.5 Ga x Fe 2-x O 4 with (0.0 ≤ x ≤ 0.5) have been prepared by the usual ceramic processing from high-purity oxides. X-ray diffraction measurements are used for analyzing the composition, lattice parameter, density, porosity and grain size of these compounds. The area ratio of Fe 3+ at the tetrahedral A-and octahedral B-sites deduced from the spectral analysis of Möss-bauer measurements on the present spinel system gives evidence that Ga replaces Fe at A-site in the range 0.0 < x ≤ 0.3. As the Ga content increases (x > 0.3), it replaces Fe at B-site. This change in the site preference reflects an abrupt change in the hyperfine parameters with Ga content at x > 0.3. The electrical measurements as a function of temperature and frequency on these materials revealed semiconducting behavior. These results show a significant increase in the frequency dependence of conductivity as Ga content increases. Variation of the universal exponent s with temperature indicates the presence of smallpolaron (SP) hopping mechanism at low Ga content. As Ga substitution progressed, the overlap large polaron (OLP) becomes the predominant hopping mechanism in these compounds. The determined transition temperature T C of these samples is found to decrease linearly with increasing Ga content x. The results obtained in this study are interpreted in light of the cation-cation and cation-anion-cation interactions in the spinel structure.

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Section: Isomer Shiftsupporting

confidence: 92%

Cation distribution, hyperfine parameters and conduction mechanism in the ferrimagnetic system Cu_0.5Co_0.5Ga_xFe_2–_xO₄

Ata‐Allah

Kaiser

2005

Physica Status Solidi (b)

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“…Usually, in a solid solution of spinels within the miscibility range, a linear change in the lattice constant with the concentration of the components (Vegard's law) [1] is observed. Non-linear behaviour, on the other hand, has been reported for systems which are not completely normal or inverse like Co Zn ferrites [13]. The X-ray densities of both sets of samples have been calculated from molecular weight and volume of the unit cell and values are given in Table I.…”

Section: Resultsmentioning

confidence: 99%

Bulk magnetic properties of Co-Zn ferrites prepared by the co-precipitation method

1991

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The alternating current (a.c.) susceptibility versus temperature and magnetization measurements are reported for the disordered spinel ferrite system Znx COl_x Fe2 04 prepared by a wet chemical method before and after high temperature annealing. The low field a.c. susceptibility measurements indicate that the low temperature synthesis of wet prepared Co-Zn ferrites aids the formation of spin-clusters and thereby increases the magnetic inhomogeneity. The X-ray analysis shows that the samples are single phase spinels and the variation of lattice constant with zinc concentration deviates from Vegard's law i-1 ]. The high temperature annealing changes the wet prepared ferrites into the ordered magnetic structure of the ceramic ferrites.

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“…The lattice constant increases linearly with increasing the Copper concentration, similar kind of results is observed by others [11][12][13] Sintering is a thermally activated process during which the total interfacial free energy of the ensemble of particles in the compact decreases due to mass transport. Transport of material is taken place mostly by volume diffusion of atoms and ions 14 . Volume diffusion proceeds either by an interstitial or by a vacancy mechanism.…”

Section: Xrd-analysismentioning

confidence: 99%

Structural Observations, Density and Porosity Studies of Cu Substituted Ni-Zn Ferrite through Standard Ceramic Technique

Raju¹,

Raju²,

Babu³

et al. 2015

Chem Sci Trans

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Polycrystalline NiCuZn ferrites prepared by solid state reaction method with various concentrations of copper generalized as Ni 0.7-x Cu x Zn 0.3 Fe 2 O 4 with the x varying from 0 to 0.50 in steps of 0.05 variations. In this paper we present the structural, density and porosity. The powders of the samples were used to characterize the x-ray diffraction. The XRD patterns of the samples provide the evidence of the single cubic crystal symmetry phase. The microstructure of the NiCuZn ferrite average grain size is recorded by SEM. The NiCuZn ferrite system having low cost and low firing metals for preparing the multi layer ferrite chip inductors and higher densification than the Mn-Zn ferrite.

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Structure and magnetization studies of Ti-substituted Ni0.3 Zn0.7Fe2O4

Cited by 66 publications

References 2 publications

Cation distribution, hyperfine parameters and conduction mechanism in the ferrimagnetic system Cu_0.5Co_0.5Ga_xFe_2–_xO₄

Cation distribution, hyperfine parameters and conduction mechanism in the ferrimagnetic system Cu_0.5Co_0.5Ga_xFe_2–_xO₄

Bulk magnetic properties of Co-Zn ferrites prepared by the co-precipitation method

Structural Observations, Density and Porosity Studies of Cu Substituted Ni-Zn Ferrite through Standard Ceramic Technique

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Structure and magnetization studies of Ti-substituted Ni0.3 Zn0.7Fe2O4

Cited by 66 publications

References 2 publications

Cation distribution, hyperfine parameters and conduction mechanism in the ferrimagnetic system Cu0.5Co0.5GaxFe2–xO4

Cation distribution, hyperfine parameters and conduction mechanism in the ferrimagnetic system Cu0.5Co0.5GaxFe2–xO4

Bulk magnetic properties of Co-Zn ferrites prepared by the co-precipitation method

Structural Observations, Density and Porosity Studies of Cu Substituted Ni-Zn Ferrite through Standard Ceramic Technique

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Cation distribution, hyperfine parameters and conduction mechanism in the ferrimagnetic system Cu_0.5Co_0.5Ga_xFe_2–_xO₄

Cation distribution, hyperfine parameters and conduction mechanism in the ferrimagnetic system Cu_0.5Co_0.5Ga_xFe_2–_xO₄