Nanocrystalline Ni0.70−xCuxZn0.30Fe2O4 with 0 ≤ x ≤ 0.25 prepared by nitrate-citrate route: structure, morphology and electrical investigations

Humbe, Ashok V.; Kharat, Prashant B.; Nawle, Anant C.; Jadhav, K. M.

doi:10.1007/s10854-017-8281-8

Cited by 22 publications

(3 citation statements)

References 43 publications

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“…N is Avogadro's number. The estimated values are found very close to the standard bond length of cation and anions present in spinel oxide [23]. The nanocrystalline size is also useful to examine the stacking faults as:…”

Section: Calculation Of Important Structural Parameterssupporting

confidence: 62%

Impact of annealing on optimization of various thermal, structural, and optical parameters of spinel ‘gahnite’ for device fabrication

Goswami¹,

Ahlawat²

2022

Phys. Scr.

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The spinel ZnAl2O4 nanopowder has been prepared using the well-known citrate sol-gel technique in which citric acid act as an agent for chelation. The XRD examined the sample crystallinity and phase purity of the samples after annealing at subsequent temperatures. Corresponding functional groups were identified by FTIR. The Surface texture of the samples was interpreted by FE-SEM and HR-TEM, while the constituent elements were evaluated by EDS spectroscopy. The UV-DR spectroscopy exhibits that the bandgap can significantly be tailored in annealed samples owing to the intrinsic impurity energy levels. PL has demonstrated the shift in emission spectra using the site-selective direct and indirect excitations. The prominent emission in the visible region is further emphasized by CIE chromaticity graphs and their specific color coordinates. The decay analysis reveals that the spinel ‘Gahnite’ samples have higher decay constant when excited with direct bandgap energy. It is suggested that the ZnAl2O4 would be a promising substitute as a blue-emitting phosphor in modern photonics.

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Section: Calculation Of Important Structural Parameterssupporting

confidence: 62%

Impact of annealing on optimization of various thermal, structural, and optical parameters of spinel ‘gahnite’ for device fabrication

Goswami¹,

Ahlawat²

2022

Phys. Scr.

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“…Therefore, Curie temperature studies are essential to apply these materials in hyperthermia applications. In our previous report, 37 we have reported the Curie temperature studies of these samples inferred by DC electrical properties. It has found that the increase in the copper content lowered the Curie temperature from 742 K to 671 K, which was attributed to the A-B exchange interactions occurring due to the distribution of Fe 3+ ions over the sub-lattices.…”

Section: Vsm Analysismentioning

confidence: 95%

Cation distribution, magnetic and hyperfine interaction studies of Ni–Zn spinel ferrites: role of Jahn Teller ion (Cu²⁺) substitution

et al. 2020

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“…They observed exothermic peak at about 220 °C and attributed to the reaction of nitrates with citric acid, whereas the exothermic peak at about 400 °C corresponds to the decomposition of citric acid. Wei-chi-Hsu et al [26], Ramakrishna et al [27], Shifengyan et al [28], and Humbe et al [29] also studied the thermo-gravimetric and differential temperature analysis for Ni-Cu-Zn ferrites.…”

Section: Thermo-gravimetric and Differential Temperature Analysismentioning

confidence: 99%

Effect of La3+ substitution on structural and magnetic parameters of Ni–Cu–Zn nano-ferrites

et al. 2019

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The ferrite material with compositions Ni 0.7 Cu 0.1 Zn 0.2 La x Fe 2−x O 4 (where x = 0, 0.015, 0.025, and 0.035) was synthesized by oxalate co-precipitation method. The ferrite samples were characterized by thermo-gravimetric and differential temperature analysis (TG-DTA), energy-dispersive X-ray analysis (EDAX), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field-emission scanning electron microscopy (FE-SEM), and vibrating sample magnetometer (VSM) techniques. The EDAX analysis confirmed the formation of required stoichiometric ferrite samples. The formation of cubic spinel structure with the presence of weak ortho-ferrite phases was confirmed from X-ray diffraction analysis. The lattice constant of all the ferrites was found to be increase with increase in La 3+ content. The presence of main two recognized strong absorption bands in the frequency range 400-600 cm −1 in the FTIR spectra shows the formation of well spinel ferrite. Morphological study shows that grain size of the ferrites lies in the range 16.23-24.21 nm. It is observed that the saturation magnetization and magnetic moment of Ni-Cu-Zn ferrites decrease with La 3+ content.

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Nanocrystalline Ni0.70−xCuxZn0.30Fe2O4 with 0 ≤ x ≤ 0.25 prepared by nitrate-citrate route: structure, morphology and electrical investigations

Cited by 22 publications

References 43 publications

Impact of annealing on optimization of various thermal, structural, and optical parameters of spinel ‘gahnite’ for device fabrication

Impact of annealing on optimization of various thermal, structural, and optical parameters of spinel ‘gahnite’ for device fabrication

Cation distribution, magnetic and hyperfine interaction studies of Ni–Zn spinel ferrites: role of Jahn Teller ion (Cu²⁺) substitution

Effect of La3+ substitution on structural and magnetic parameters of Ni–Cu–Zn nano-ferrites

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Nanocrystalline Ni0.70−xCuxZn0.30Fe2O4 with 0 ≤ x ≤ 0.25 prepared by nitrate-citrate route: structure, morphology and electrical investigations

Cited by 22 publications

References 43 publications

Impact of annealing on optimization of various thermal, structural, and optical parameters of spinel ‘gahnite’ for device fabrication

Impact of annealing on optimization of various thermal, structural, and optical parameters of spinel ‘gahnite’ for device fabrication

Cation distribution, magnetic and hyperfine interaction studies of Ni–Zn spinel ferrites: role of Jahn Teller ion (Cu2+) substitution

Effect of La3+ substitution on structural and magnetic parameters of Ni–Cu–Zn nano-ferrites

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Cation distribution, magnetic and hyperfine interaction studies of Ni–Zn spinel ferrites: role of Jahn Teller ion (Cu²⁺) substitution