Structural, elastic, thermodynamic, electronic, magnetic, thermoelectric and optical investigation of chromate spinels TCr2O4 [T = V2+, Mn2+, Fe2+] for optoelectronic applications

H.-E., M. Musa Saad; Alsobhi, B. O.; Almeshal, Abdelkareem

doi:10.1016/j.matchemphys.2022.127041

Cited by 2 publications

(1 citation statement)

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“…Due to a remarkable combination of their outstanding physical, chemical, and structural features, as well as a variety of promising applications, mixed ferrite systems have attracted increasing attention in recent years. Due to their significant magnetic properties, particularly in the radio frequency region, physical flexibility, high electrical resistivity, mechanical hardness, and chemical stability, spinel ferrites are among an important class of magnetic materials [1][2][3][4][5][6][7][8]. The majority of mixed oxides, except the lithium-nickel oxide and the lithium-cobalt oxide systems, possess a spinel structure of the general formula M x M' 3−x O 4 (M, M' = Ni, Co, Fe, Mn, Cr.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Structural and Magnetic Characterization of Superparamagnetic Ni0.3Zn0.7Cr2−xFexO4 Oxides Obtained by Sol-Gel Method

Mallah,

Al-Thuwayb,

Khitouni

et al. 2023

Crystals

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The sol-gel process was used to produce ferrite Ni0.3Zn0.7Cr2−xFexO4 compounds with x = 0, 0.4, and 1.6, which were then subsequently calcined at several temperatures up to 1448 K for 48 h in an air atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), and 57Fe Mössbauer spectrometry were used to examine the structure and magnetic characteristics of the produced nanoparticles. A single-phase pure Ni0.3Zn0.7Cr2−xFexO4 nanoparticle had formed. The cubic Fd3¯m spinel structure contained indexes for all diffraction peaks. The crystallite size is a perfect fit for a value of 165 ± 8 nm. Based on the Rietveld analysis and the VSM measurements, the low magnetization Ms of Ni0.3Zn0.7Cr2−xFexO4 samples was explained by the absence of ferromagnetic Ni2+ ions and the occupancy of Zn2+ ions with no magnetic moments in all tetrahedral locations. Moreover, because of the weak interactions between Fe3+ ions in the octahedral locations, the magnetization of the current nanocrystals is low or nonexistent. According to Mössbauer analyses, the complicated hyperfine structures are consistent with a number of different chemical atomic neighbors, such as Ni2+, Zn2+, Cr3+, and Fe3+ species that have various magnetic moments. A Fe-rich neighbor is known to have the highest values of the hyperfine field at Fe sites, while Ni- and Cr-rich neighbors are responsible for the intermediate values and Zn-rich neighbors are responsible for the quadrupolar component.

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