Effect of Yb doping on the structural and magnetic properties of cobalt ferrite nanoparticles

Ghorbani, Hamid Reza; Eshraghi, M.; Dodaran, Amir Abbas Sabouri; Kameli, P.; Protasowicki, Stacey; Johnson, C. L.; Vashaee, Daryoosh

doi:10.1016/j.materresbull.2021.111642

Cited by 44 publications

(11 citation statements)

References 43 publications

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“…In the case of a

space group, an inversion center is present because of the centrosymmetric group, which implies the mutual exclusion of the Raman and infrared activities for the same vibrational modes. It is worth specifying which Raman peaks are associated with the different polyhedrons; the modes corresponding to octahedrons are present in the range of 460–660 cm −1 , while the modes corresponding to tetrahedrons are those between 660 and 720 cm −1 [ 19 ].…”

Section: Resultsmentioning

confidence: 99%

Structural Characterization and Magnetic Behavior Due to the Cationic Substitution of Lanthanides on Ferrite Nanoparticles

Pinto García,

Maine,

Valenzuela-Fernández

et al. 2024

Nanomaterials

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A new series of [Fe3−xLnx]O4 nanoparticles, with Ln = Gd; Dy; Lu and x = 0.05; 0.1; 0.15, was synthesized using the coprecipitation method. Analyses by X-ray diffraction (XRD), Rietveld refinement, and high-resolution transmission electron microscopy (HRTEM) indicate that all phases crystallized in space group Fd3¯m, characteristic of spinels. The XRD patterns, HRTEM, scanning electron microscopy analysis (SEM-EDS), and Raman spectra showed single phases. Transmission electron microscopy (TEM), Rietveld analysis, and Scherrer’s calculations confirm that these materials are nanoparticles with sizes in the range of ~6 nm to ~13 nm. Magnetic measurements reveal that the saturation magnetization (Ms) of the as-prepared ferrites increases with lanthanide chemical substitution (x), while the coercivity (Hc) has low values. The Raman analysis confirms that the compounds are ferrites and the Ms behavior can be explained by the relationship between the areas of the signals. The magnetic measurements indicate superparamagnetic behavior. The blocking temperatures (TB) were estimated from ZFC-FC measurements, and the use of the Néel equation enabled the magnetic anisotropy to be estimated.

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“…In the case of a

Section: Resultsmentioning

confidence: 99%

Structural Characterization and Magnetic Behavior Due to the Cationic Substitution of Lanthanides on Ferrite Nanoparticles

Pinto García,

Maine,

Valenzuela-Fernández

et al. 2024

Nanomaterials

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“…Generally, a higher degree of crystallinity signifies more molecular chain arrangement, which requires a higher temperature to destroy, and the melting point is also increased. This also indirectly shows that adding Yb can improve the heat resistance of the material [ 19 , 20 , 21 , 22 , 23 , 24 ]. Moreover, a Co 60 Fe 20 B 20 thin film can be commonly used as a free or pinned layer in a magnetic tunneling junction (MTJ) structure, and it is necessary to improve TMR and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Effects of Annealing and Thickness of Co60Fe20Yb20 Nanofilms on Their Structure, Magnetic Properties, Electrical Efficiency, and Nanomechanical Characteristics

et al. 2022

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X-ray diffraction (XRD) analysis showed that metal oxide peaks appear at 2θ = 47.7°, 54.5°, and 56.3°, corresponding to Yb2O3 (440), Co2O3 (422), and Co2O3 (511). It was found that oxide formation plays an important role in magnetic, electrical, and surface energy. For magnetic and electrical measurements, the highest alternating current magnetic susceptibility (χac) and the lowest resistivity (×10−2 Ω·cm) were 0.213 and 0.42, respectively, and at 50 nm, it annealed at 300 °C due to weak oxide formation. For mechanical measurement, the highest value of hardness was 15.93 GPa at 200 °C in a 50 nm thick film. When the thickness increased from 10 to 50 nm, the hardness and Young’s modulus of the Co60Fe20Yb20 film also showed a saturation trend. After annealing at 300 °C, Co60Fe20Yb20 films of 40 nm thickness showed the highest surface energy. Higher surface energy indicated stronger adhesion, allowing for the formation of multilayer thin films. The optimal condition was found to be 50 nm with annealing at 300 °C due to high χac, strong adhesion, high nano-mechanical properties, and low resistivity.

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“…For optimizing CoFe 2 O 4 properties, the researchers have followed different ways such as synthesis methods like combustion [29,30], co-precipitation [31,32], microwave combustion [33], sol-gel [34][35][36] and microemulsion [37], laser ablation [38] and doping with various elements into the matrix [39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Detailed studies on structural, morphological, optical, magnetic and mossbauer properties of Cu-substituted cobalt ferrite nanoparticles

Ergin¹,

İçi̇n²,

Güngüneş³

et al. 2023

Phys. Scr.

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In this research, the effect on the morphology, structure, optic, magnetic and Mossbauer features of Cu2+ doping in Co1-xCuxFe2O4 (x=0.0-1.0) nanoparticles fabricated using the sol-gel auto-combustion reaction method were investigated. The mainly pure phase structure of Co-spinel was observed in X-ray diffraction (XRD) patterns. The sizes of crystal were observed in between 28.77–36.25 nm. The fundamental vibrational bands of the nanoparticles have been found at 426 and 602 cm-1 wavelengths via the Fourier transform infrared (FT-IR) spectrum. The most of Co2+ ions are located at the A site and that substitution by Cu+2 ions at the octahedral site for x=0.0, 0.25, and 0.50. for x=0.75 content, the Mössbauer results show that some Cu2+ ions are present in both A and B sites. Magnetization measurements at room temperature show that Cu2+ substitution into Co-ferrite significantly changes the magnetic quantities such as coercivity field (Hc), remnant (Mr) and saturation magnetization (Ms). Magnetic hysteresis curves obtained at room temperature show well-known S-shaped features for all nanoparticles with Ms values of 51.5-64.4 emu/g, Mr values of 31-36 emu/g and Hc values of 429.5-1447.8 Oe.

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Effect of Yb doping on the structural and magnetic properties of cobalt ferrite nanoparticles

Cited by 44 publications

References 43 publications

Structural Characterization and Magnetic Behavior Due to the Cationic Substitution of Lanthanides on Ferrite Nanoparticles

Structural Characterization and Magnetic Behavior Due to the Cationic Substitution of Lanthanides on Ferrite Nanoparticles

Effects of Annealing and Thickness of Co60Fe20Yb20 Nanofilms on Their Structure, Magnetic Properties, Electrical Efficiency, and Nanomechanical Characteristics

Detailed studies on structural, morphological, optical, magnetic and mossbauer properties of Cu-substituted cobalt ferrite nanoparticles

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