Electric and AC magnetic investigation of the manganites La0.7Ca0.3Mn0.96In0.04xAl(1−x)0.04O3; (0.0⩽x⩽1.0)

Mostafa, M.F.; Ata‐Allah, S.S.; Youssef, A.A.; Refai, H. S.

doi:10.1016/j.jmmm.2007.06.022

Cited by 32 publications

(6 citation statements)

References 48 publications

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“…Furthermore, the Ba 2− x Sr x MgTeO 6 series was found in a (Fm-3m) cubic crystal structure [20]. The crystallite size was calculated from the Full width at half maximum (FWHMs) at the major peaks at (220) for the Ba 2− x Sr x ZnWO 6 ( x = 0.00, 0.25, 0.50, 0.75, 1.00) double perovskite series using the Scherer equation [21], which was observed to vary between 47.41 and 105.9 nm for the samples.

D = \frac{0.94 λ}{β \cos θ},

where D is the crystalline size, λ is the wavelength (1.5405 Å), β is the full width at half maximum, and θ is the diffraction angle.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Study of the Effect of Ba2+ Cations Substitution with Sr2+ Cations on Structural and Optical Properties of Ba2−xSrxZnWO6 Double Perovskite Oxides (x = 0.00, 0.25, 0.50, 0.75, 1.00)

et al. 2017

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The effect of Sr2+ substitution on the morphology, crystal structure, and optical properties of double perovskite oxide Ba2−xSrxZnWO6 (x = 0.00, 0.25, 0.50, 0.75, 1.00) were investigated. Scanning electronic microscopy demonstrated that all samples have similar microstructure morphology but differ in the range of grain sizes. X-ray diffraction measurements indicated that these materials crystallize in a (Fm-3m) cubic crystal structure, and also confirmed the tolerance factor. Rietveld analysis revealed that the lattice parameter decreased from 8.11834 to 8.039361 Å when the substitution of Ba2+ with Sr2+ cations increased from zero to 100%. Fourier transform infrared (FTIR) and Raman spectroscopies displayed a symmetric stretching vibration of WO6 octahedra at 825 cm−1, and an anti-symmetric stretching mode of WO6 was observed by FTIR at 620 cm−1. A strong peak at 420 cm−1 was also observed in the Raman spectra and is due to the W–O–W bending vibration modes. UV-Vis diffuse reflectance spectroscopy was carried out for the series, and the band gap energy decreased from 3.27 eV for Ba2ZnWO6 to 3.02 and 3.06 eV for Ba1.75Sr0.25ZnWO6 and Ba1.5Sr0.5ZnWO6, respectively. The excitation and emission photoluminescence properties were investigated at room temperature.

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D = \frac{0.94 λ}{β \cos θ},

where D is the crystalline size, λ is the wavelength (1.5405 Å), β is the full width at half maximum, and θ is the diffraction angle.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Study of the Effect of Ba2+ Cations Substitution with Sr2+ Cations on Structural and Optical Properties of Ba2−xSrxZnWO6 Double Perovskite Oxides (x = 0.00, 0.25, 0.50, 0.75, 1.00)

et al. 2017

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“…The FTIR spectra of the perovskite structure have three characteristic absorption bands between 850 -400 cm −1 , respective to composition and these are usually used to identify the perovskite phase formation [21]. It is based on infrared spectrum can be used for molecules such as fingerprint for humans [22].…”

Section: The Ir Spectroscopy Resultsmentioning

confidence: 99%

The Effect of Replacement of Zn 2+ Cation with Ni 2+ Cation on the Structural Properties of Ba sub>2Zn sub>1–x Ni sub>xWO sub>6 Double Perovskite Oxides (X = 0, 0.25, 0.50, 0.75, 1)

Alsabah¹,

Elbadawi²,

Mustafa³

et al. 2016

MSCE

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The Ba 2 Zn 1-x Ni x WO 6 double perovskite oxides were synthesized using solid state reaction method. The effect of replacement of Zn 2+ with Ni 2+ cation on the structural properties was investigated by X-ray diffraction (XRD) at room temperature. From the X-ray diffraction and by means of standard Rietiveld method, the samples showed the same cubic crystal structure with (Fm-3m) space group and the crystallite size ranging from 71.91 nm to 148.71 nm. The unit cell volume was found to decrease as a result of the replacement, while there was no significant difference in the value of tolerance factor of the samples. This is may be due to the convergence of ionic radii of Ni 2+ and Zn 2+ cations. The Fourier Transform Infrared Spectroscopy (FTIR) was performed for the samples and the resultant characteristic absorption bands confirmed the double perovskite structure.

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“…22 The strong band at "$ 823 cm À1 of the studied compound is assigned to the anti-symmetric stretching mode of the octahedra VO 6 and BiO 6 due to the higher charge of this cation. 23 The IR spectrums at 453 and 528 cm À1 are attributed to that of the O-V-O asymmetric bending modes which are strong in the infrared spectrum. The bands positioned at 680 and 739 cm À1 are ascribed to C=C stretching mode of vibrations.…”

Section: Ftir Analysismentioning

confidence: 97%

Structural and optical properties of a revived Pb0.5Ba1.5BiVO₆ perovskite oxide

et al. 2019

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The polycrystalline ceramic Pb[Formula: see text]Ba[Formula: see text]BiVO6 manifesting the complex double perovskite structure was tailored by the conventional solid state route at a moderate temperature. Qualitative phase analysis and formation of the ceramic were affirmed by XRD analysis. The X-ray powder diffraction pattern of the compound explored at room temperature affirms the single phase formation with double perovskite structure exhibiting rhombohedral phase. Microstructural analysis of the studied compound procured from the Scanning Electron Microscope (SEM) validates the formation of dense microstructures and nonuniformly distributed grains with minimal voids. Compositional analysis was shaped through the Electron Diffraction Spectroscopy (EDS) confirming the absence of contamination of any other metals apart from the mentioned ones. Dielectric (Cr and [Formula: see text]) parameters of the compound were studied using the LCR analyzer at different temperatures and wide range of frequencies. The polarization and dielectric study affirms the presence of ferroelectricity in the material with transition temperature much above the room temperature. The tangent dielectric loss of this sample being almost minimal at room temperature attributes it to find applications in different grounds of electronics. Optical equities of the ceramic were further analyzed by the RAMAN, FTIR, UV–Vis and Photoluminescence spectroscopy.

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Electric and AC magnetic investigation of the manganites La0.7Ca0.3Mn0.96In0.04xAl(1−x)0.04O3; (0.0⩽x⩽1.0)

Cited by 32 publications

References 48 publications

Synthesis and Study of the Effect of Ba2+ Cations Substitution with Sr2+ Cations on Structural and Optical Properties of Ba2−xSrxZnWO6 Double Perovskite Oxides (x = 0.00, 0.25, 0.50, 0.75, 1.00)

Synthesis and Study of the Effect of Ba2+ Cations Substitution with Sr2+ Cations on Structural and Optical Properties of Ba2−xSrxZnWO6 Double Perovskite Oxides (x = 0.00, 0.25, 0.50, 0.75, 1.00)

The Effect of Replacement of Zn <sup>2+</sup> Cation with Ni <sup>2+</sup> Cation on the Structural Properties of Ba sub>2</sub>Zn sub>1–x </sub>Ni sub>x</sub>WO sub>6</sub> Double Perovskite Oxides (X = 0, 0.25, 0.50, 0.75, 1)

Structural and optical properties of a revived Pb0.5Ba1.5BiVO₆ perovskite oxide

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Electric and AC magnetic investigation of the manganites La0.7Ca0.3Mn0.96In0.04xAl(1−x)0.04O3; (0.0⩽x⩽1.0)

Cited by 32 publications

References 48 publications

Synthesis and Study of the Effect of Ba2+ Cations Substitution with Sr2+ Cations on Structural and Optical Properties of Ba2−xSrxZnWO6 Double Perovskite Oxides (x = 0.00, 0.25, 0.50, 0.75, 1.00)

Synthesis and Study of the Effect of Ba2+ Cations Substitution with Sr2+ Cations on Structural and Optical Properties of Ba2−xSrxZnWO6 Double Perovskite Oxides (x = 0.00, 0.25, 0.50, 0.75, 1.00)

The Effect of Replacement of Zn &lt;sup&gt;2+&lt;/sup&gt; Cation with Ni &lt;sup&gt;2+&lt;/sup&gt; Cation on the Structural Properties of Ba sub&gt;2&lt;/sub&gt;Zn sub&gt;1–x &lt;/sub&gt;Ni sub&gt;x&lt;/sub&gt;WO sub&gt;6&lt;/sub&gt; Double Perovskite Oxides (X = 0, 0.25, 0.50, 0.75, 1)

Structural and optical properties of a revived Pb0.5Ba1.5BiVO6 perovskite oxide

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The Effect of Replacement of Zn <sup>2+</sup> Cation with Ni <sup>2+</sup> Cation on the Structural Properties of Ba sub>2</sub>Zn sub>1–x </sub>Ni sub>x</sub>WO sub>6</sub> Double Perovskite Oxides (X = 0, 0.25, 0.50, 0.75, 1)

Structural and optical properties of a revived Pb0.5Ba1.5BiVO₆ perovskite oxide