Raman, infrared and Mössbauer spectroscopic studies of solid-state synthesized Ni-Zn ferrites

Gómez, Carlos Andrés Palacio; Meneses, César Augusto Barrero; Jaén, Juan A.

doi:10.1016/j.jmmm.2020.166710

Cited by 23 publications

(5 citation statements)

References 49 publications

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“…This peak has shoulder peak that confirms the formation of zinc ferrite and eliminates the formation of iron oxide [75]. The active bands detected around 229.5 cm −1 and 452-457 cm −1 designate the E g and F 2g (3) modes, respectively, describing the symmetric and antisymmetric bending vibrations of O 2− with respect to the metal cation in the tetrahedral AO 4 unit [74]. The peak at frequency 335-337 cm −1 corresponds to F 2g (2) mode referring to the asymmetric stretching vibration of the metal -oxygen bond, which implies an opposite motion of M and O ions in the spinel lattice [76].…”

Section: Raman Analysismentioning

confidence: 83%

“…Five active bands were recorded in the obtained Raman spectra, confirming the formation of the cubic (Fd3m) spinel ferrite. The lowest frequency peak at 148-154 cm −1 corresponds to the F 2g (1) vibrational mode related to the translational motion of the tetrahedron consisting of metal-O 4 (AO 4 ) unit in the spinel lattice [74]. This peak has shoulder peak that confirms the formation of zinc ferrite and eliminates the formation of iron oxide [75].…”

Section: Raman Analysismentioning

confidence: 98%

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Influence of samarium on the structural, magnetic, and gas sensing performance of cadmium zinc ferrites

Korek,

Habanjar,

Awad

2024

Phys. Scr.

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Cadmium zinc ferrites Cd0.5Zn0.5SmxFe2-xO4 nanoparticles were synthesized with different concentrations x = 0.00, 0.01, 0.02, 0.04, 0.06, and 0.08, via the wet chemical co-precipitation method. The effects of the Sm3+ doping on the structural, morphological, compositional, and magnetic properties have been investigated. The structural analysis is performed using X-ray diffraction (XRD) with Rietveld refinement. The results indicate great crystallinity in the FCC Fd3m spinel structure of Cd0.5Zn0.5SmxFe2-xO4 nanoparticles. The crystallite size was estimated using Debye-Scherrer, Williamson–Hall, Size-strain plot (SSP), and Halder-Wagner (H-W) methods. It revealed a decreasing trend with the increase of Sm-doping concentrations until the solubility limit at around x = 0.04. The spherical morphology of the samples was investigated using transmission electron microscopy (TEM) with minor agglomeration as a benefit of using the capping agent polyvinylpyrrolidone (PVP). Raman spectroscopy validates the incorporation of trivalent Sm3+ in the octahedral sites. X-ray photoelectron spectroscopy (XPS) verified the elemental compositions as well as the purity of the samples and the incorporation of the dopants. A vibrating sample magnetometer (VSM) was used to study the magnetic properties, and which indicates the superparamagnetic behavior of the prepared samples. The prepared samples were tested as liquefied petroleum gas (LPG) sensors by studying their sensitivity, optimum working temperature, response time, and recovery time. The doping of samarium ions reveals a great increase in LPG sensing sensitivity and optimum temperature with decreasing response and recovery times.

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Section: Raman Analysismentioning

confidence: 83%

Section: Raman Analysismentioning

confidence: 98%

Influence of samarium on the structural, magnetic, and gas sensing performance of cadmium zinc ferrites

Korek,

Habanjar,

Awad

2024

Phys. Scr.

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“…The asymmetric bending vibration of O atoms with regard to M at tetrahedral sites is attributed to the bands at 540-571 cm −1 in the T(3) 2g active mode. The bands in the range 670-710 cm −1 in A(1) 1g modes are attributed to the symmetric stretching vibrations of M-O in tetrahedral (A) sites, whereas T(1) 2g is attributable to the band at 150-250 cm −1 which is the translational movement of the whole tetrahedron [30]. The UV-vis diffuse reflectance is investigated in the range of 350-800 nm for NFO NPs figure 2(c).…”

Section: Resultsmentioning

confidence: 99%

NiFe₂O₄ nanoparticles for non-volatile bipolar resistive switching memory device

Patil,

Nikam,

Teli

et al. 2023

Semicond. Sci. Technol.

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The existing work addresses the chemical synthesis of NiFe2O4 (NFO) nanoparticles (NPs) with the help of PVP as a capping agent and NiFe2O4 NPs are used as a switching layer material in memory device. For the confirmation of the materials phase, composition, and optical properties, various analytical techniques were used. By the support of the X-ray diffraction (XRD) technique, crystal structure (cubic spinel) and crystallite size (20.12 nm) were determined. Field emission scanning electron microscopy (FE-SEM) was used to confirm the material morphology. Raman Spectroscopy and Fourier Transform Infrared Spectroscopy (FT-IR) were applied to identify the of NiFe2O4 NPs functional groups. For the non-volatile memory device , Ag/NFO/FTO was fabricated, which shows bipolar resistive switching with good endurance (104 cycles) and retention (6 x 103 s). The I–V characteristics of the actual device indicates that the deposition order of the film is a decisive part in the device performance. Moreover, the conduction and resistive switching mechanism of the device were also carried out.

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“…Infrared (IR) and Raman spectroscopy serve as essential techniques for investigating the vibrational modes of spinel ferrites, contributing significant insights into their physical and chemical properties. Nevertheless, the task of assigning IR and Raman modes in these materials poses a significant challenge. − The complex nature of these materials, characterized by the presence of metal cations in varied sites within the crystal lattice, gives rise to multiple vibrational modes, further complicating the assignment of IR and Raman modes. , The overlap of the IR and Raman bands adds another layer of complexity, often resulting from multiple vibrational modes stemming from the tetrahedral and octahedral sites. Broad IR and Raman bands frequently observed in these materials can be attributed to site disorder, strain, or even instrumental limitations.…”

Section: Introductionmentioning

confidence: 99%

Unraveling the Complex Interplay of Phase Transitions in Spinel Ferrites: A Comprehensive Quantum Mechanical Vibrational Study of ZnFe₂O₄

Almutairi

2023

ACS Omega

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The rich phase transition landscape of spinel ferrites and its profound impact on their physical properties have garnered significant interest in recent years. The complex interplay of divalent and trivalent cations distributed across A-and B-sites gives rise to a captivating variety of interactions. In this study, we delve into the structural, electronic, magnetic, and vibrational properties of ZnFe 2 O 4 as a function of the degree of inversion, employing first-principles density functional theory with global and rangeseparated hybrid functionals and a local basis set. The ground state of ZnFe 2 O 4 is an open-shell system, characterized by Zn atoms occupying tetrahedral sites, Fe atoms residing in octahedral sites, and Fe atom spins exhibiting ligand parallel alignment. In the normal structure, the antiparallel arrangement is less stable than the ferro arrangement by 0.058 eV (673 K) for fully relaxed structures, decreasing to 0.034 eV (395 K) upon incorporating a zero-point vibrations contribution. For normal ferromagnetic ZnFe 2 O 4 , we calculated scattering for A 1g , E g , and 3T 2g symmetry at 676.6, 367.1, and (189.7, 457.7, 602.3) cm −1 , respectively. Additionally, four T 1u vibrational frequencies predicted by group theory were obtained at 524.59, 358.48, 312.49, and 192.9 cm −1 , demonstrating excellent agreement with the experimental studies. We also explored the influence of spin rearrangement and inversion (X = 0.5 and 1) on Raman and infrared spectra. By analyzing the infrared spectra of isotopic substitutions, we reevaluated the assignments of the four T 1u modes in light of available experimental data. Notably, the sensitivity of peak positions and intensities for some Raman modes, particularly A 1g and T 2g (2), to spin arrangement could provide a convenient experimental tool for detecting phase transitions induced by changes in temperature or external electric fields. This investigation shines a light on the complex interplay of phase transitions in spinel ferrites, paving the way for a deeper understanding of their properties and potential applications.

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Raman, infrared and Mössbauer spectroscopic studies of solid-state synthesized Ni-Zn ferrites

Cited by 23 publications

References 49 publications

Influence of samarium on the structural, magnetic, and gas sensing performance of cadmium zinc ferrites

Influence of samarium on the structural, magnetic, and gas sensing performance of cadmium zinc ferrites

NiFe₂O₄ nanoparticles for non-volatile bipolar resistive switching memory device

Unraveling the Complex Interplay of Phase Transitions in Spinel Ferrites: A Comprehensive Quantum Mechanical Vibrational Study of ZnFe₂O₄

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Raman, infrared and Mössbauer spectroscopic studies of solid-state synthesized Ni-Zn ferrites

Cited by 23 publications

References 49 publications

Influence of samarium on the structural, magnetic, and gas sensing performance of cadmium zinc ferrites

Influence of samarium on the structural, magnetic, and gas sensing performance of cadmium zinc ferrites

NiFe2O4 nanoparticles for non-volatile bipolar resistive switching memory device

Unraveling the Complex Interplay of Phase Transitions in Spinel Ferrites: A Comprehensive Quantum Mechanical Vibrational Study of ZnFe2O4

Contact Info

Product

Resources

About

NiFe₂O₄ nanoparticles for non-volatile bipolar resistive switching memory device

Unraveling the Complex Interplay of Phase Transitions in Spinel Ferrites: A Comprehensive Quantum Mechanical Vibrational Study of ZnFe₂O₄