Hydrothermal Temperature Influence on Magnetic and FMR Properties of Hematite Nanoparticles

Lafta, Sadeq H.

doi:10.2139/ssrn.3989692

Cited by 1 publication

(3 citation statements)

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“…The calculated data are shown in Table 2. Finally, the peaks around 25° and 33° mainly related to the formation of a small quantity of α-Fe 2 O 3 , where these peaks coincide with its (012) and (104) plane [11]. Hematite, α-Fe 2 O 3 phase, is usually formed during synthesizing ferrite under un-optimized conditions [12].…”

Section: Experimental Partmentioning

confidence: 99%

“…The following reactions are suggested to synthesize the Cs y Co The average crystallite size D was calculated by the Scherrer formula as in eq. ( 1) [11]: 𝐷 = 0.9 λ/β cosθ (1) where β is the full width at half maximum of the for the planes (311), λ is the wavelength of x-rays (1.5406Å), and θ is the diffraction angle. All the calculated average crystallite sizes were in the nanometer range.…”

Section: Experimental Partmentioning

confidence: 99%

“…The crystalline anisotropic constant (K an ) values are calculated by eq. (11). The K an value is generally minimized as Cs 1+ content grows.…”

Section: Magnetic Hysteresis Loops Analysismentioning

confidence: 99%

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INVESTIGATION THE MAGNETIC PROPERTIES OF CsyCo1-0.5yFe2O4 NANOPARTICLES AT LOW MOLAR RATIO VARIATION

Tareq

2023

Eurasian phys. tech. j.

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The effect of substitution ferrite by previously not used elements to control magnetic properties is of great interest to researchers. This study illustrates the effect of low substitution of Cs, with molar ratios of y of 0.0, 0.05, 0.15, and 0.25 on the structural and magnetic properties of CsyCo1-0.5yFe2O4nanoparticles. The synthesizing method was the co-precipitation method. The metal chlorides were used to perform the reaction in the distilled water using NaOH to reach a pH of 10. The X-ray diffraction, Field Emission Scanning Electron Microscopy, Electron Dispersive X-ray and Vibrating Sample Magnetometry analyses were conducted for all samples. All samples had the patternsof the spinel structure coincide to a high degree with the Co ferrite pattern. There was a general increase in the lattice constant with the increase in the Cs content, while the crystallite size decreased from about 18 to 12.2 nm as the molar ratio increased from 0 to 0.25. The Electron Microscopy investigation showed that all samples owing spherical nanoparticles with no other shapes. The average particle sizes were between 40 to 60nm, which increased Cs1+content. The magnetic parameters mainly showed a relatively high coercivity (wide loops) and a decrease in magnetization saturation (down to 50.43emu/g), crystalline anisotropic constant, and thesquareness ratio

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Section: Experimental Partmentioning

confidence: 99%

Section: Experimental Partmentioning

confidence: 99%