Structural and Magnetic Study of Zn-Substituted NiGa y Fe 2−y O 4 Ferrite

Hashhash, A.; Yehia, M.; Ismail, S. M.; Ata‐Allah, S.S.

doi:10.1007/s10948-014-2594-0

Cited by 11 publications

(10 citation statements)

References 14 publications

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“…The details were reported earlier [10]. The formation of a single-phase cubic spinel was confirmed with X-ray diffraction studies at room temperature.…”

Section: Preparation Methods and Techniquessupporting

confidence: 53%

“…As Zn 2+ concentration increases, (0.3 ≤ x ≤ 0.5) the frequency dependence of conductivity is observed at a wider range of temperatures. In the present system, at x = 0.0, the Mossbauer study [10] showed that Ga +3 ions occupy A-and B-sites as As a result, the conductivity is almost frequency independent at different ranges of temperature for this sample. As the compositional parameter increases (0.1 ≤ x ≤ 0.5), the Mossbauer results [10] showed that Fe 3+ transfers from the A-to B-site.…”

Section: Infrared Spectra Interpretationmentioning

confidence: 54%

“…Figure 1 shows an X-ray diffraction pattern for Ni 0.7 Zn 0.3 Ga 0.5 Fe 1.5 O 4 (as an example of the present group of samples). Detailed discussion of the crystallographic parameters obtained from XRD results for the present samples are already studied elsewhere [10]. The average crystallite particle size of sintered ferrites calculated from Scherrer's equation [5] is presented in Table 1.…”

Section: X-ray Diffractionmentioning

confidence: 99%

“…Generally, the values of the vibration frequencies decrease with increasing bond length as a result of substituting elements with different ionic radii in the spinel unit cell [19]. Therefore, the addition of Zn 2+ ions with larger radius and greater atomic weight in both A-and B-sites [10] results in the increase of On the other hand, introduction of Ga 3+ ions to the B-site replacing Ni 2+ ions with comparatively larger radius and low atomic weight will increase the frequency of vibration [20]. Figure 3 shows the variation of ac conductivity as (lnσ) with the reciprocal of absolute temperature as (1000 T −1 ) at different frequencies for the synthesized samples.…”

Section: Infrared Spectra Interpretationmentioning

confidence: 99%

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Electrical and Dielectric Relaxation Characterization of Ni1−x Zn x Ga0.5Fe1.5O4

Hashhash

Kaiser

Ata‐Allah

2015

J Supercond Nov Magn

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The ferrite system, Ni 1−x Zn x Ga 0.5 Fe 1.5 O 4 (x ranges from 0.0 to 0.5 in steps of 0.1), has been synthesized by a solid-state reaction technique. Single-phase cubic spinel structure was confirmed with X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) results. The effect of introducing zinc in the unit cell on the electrical properties was investigated in the ranges 10 2 -10 5 Hz and 300-600 K of frequency and temperature, respectively. Semiconducting behavior over all studied ranges of frequency and temperature was observed. This behavior is attributed to the cation-anion-cation interaction, which is most predominant at B-sites in these samples. Variation of the universal exponents with temperature indicates the presence of a correlated barrier hopping (CBH) mechanism. The determined transition temperature T C was found to decrease with increasing the compositional parameter x.

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“…The details were reported earlier [10]. The formation of a single-phase cubic spinel was confirmed with X-ray diffraction studies at room temperature.…”

Section: Preparation Methods and Techniquessupporting

confidence: 53%

Section: Infrared Spectra Interpretationmentioning

confidence: 54%

Section: X-ray Diffractionmentioning

confidence: 99%

Section: Infrared Spectra Interpretationmentioning

confidence: 99%

See 2 more Smart Citations

Electrical and Dielectric Relaxation Characterization of Ni1−x Zn x Ga0.5Fe1.5O4

Hashhash

Kaiser

Ata‐Allah

2015

J Supercond Nov Magn

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“…The 3d and 4f orbitals of the doped transition metals and rare-earth elements interact with 3d orbitals of Fe and Ni ions. These interactions depend on the number and distribution of electrons in the 3d and 4f orbitals which define magnetic properties of these elements [1][2][3][4]. Another important factor is the cation distribution of these ions in the tetrahedral (A) and octahedral [B] sites of the doped nickel ferrite [1].…”

Section: Introductionmentioning

confidence: 99%

Influence of Zinc Doping on the Structural and Magnetic Properties of Ni-Ga-Sm Polycrystalline Ferrites

Ismail

Yehia

Ata‐Allah

2015

J Supercond Nov Magn

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Polycrystalline Ni 1−x Zn x Fe 1.49 Ga 0.5 Sm 0.01 O 4 (0 ≤ x ≤ 0.5) spinel ferrite powders were prepared using standard ceramic method. Structural and magnetic properties of the sintered samples were investigated using X-ray powder diffraction, Mössbauer effect spectroscopy, and vibrating sample magnetometer. X-ray analysis confirmed the formation of single phase cubic spinel ferrites for all samples. The cation distribution obtained from the Mössbauer effect measurements suggested that Sm 3+ ions substituted iron in the octahedral [B] site and increase the magnetism in the studied samples. On the other hand, Ga 3+ ions replaced iron in both tetrahedral (A) sites and octahedral [B] sites. For x ≤ 0.3, Zn 2+ ions are introduced to (A) sites and unusually for higher Zn content, x > 0.3, they distribute in both (A) and [B] sites and suppress magnetism in this system. The cation distribution obtained from the Mössbauer effect measurements explains well the change in the values of both lattice parameter (a) and the saturation magnetization (M s ).

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Structural and magnetic study of Sm doped NiFe2O4 nanoparticles

Yehia

Hashhash

2019

J Mater Sci: Mater Electron

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Structural and Magnetic Study of Zn-Substituted NiGa y Fe 2−y O 4 Ferrite

Cited by 11 publications

References 14 publications

Electrical and Dielectric Relaxation Characterization of Ni1−x Zn x Ga0.5Fe1.5O4

Electrical and Dielectric Relaxation Characterization of Ni1−x Zn x Ga0.5Fe1.5O4

Influence of Zinc Doping on the Structural and Magnetic Properties of Ni-Ga-Sm Polycrystalline Ferrites

Structural and magnetic study of Sm doped NiFe2O4 nanoparticles

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