Modification of Co/Cu nanoferrites properties via Gd3+/Er3+doping

Ateia, Ebtesam E.; Soliman, Fatma S.

doi:10.1007/s00339-017-0948-8

Cited by 25 publications

(6 citation statements)

References 37 publications

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“…This is the main issue for using a low Ag content (<30 wt%). The peak broadness of the diffraction patterns verified the nano size range of the investigated samples, which was similar to our previous report [14].…”

Section: Resultssupporting

confidence: 91%

“…The solubility limit is determined by the relatively larger ionic radii of the ions compared to the dimensions of A or B sites, as well as the rate of cooling of the samples. As previously demonstrated in our study [14], the incorporation of Er 3+ (0.89 • A) and Gd 3+ (0.938 • A) ions into SF would result in structural deformation. Larger ionic radii of RE ions compared to Fe ions imply greater strain, which changed the magnetic and electrical properties.…”

Section: Introductionsupporting

confidence: 79%

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Designing bi-functional Ag-CoGd_0.025Er_0.05Fe_1.925O₄ nanoarchitecture via green method

Ateia,

Elraaie,

Mohamed

2024

J. Phys. D: Appl. Phys.

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In the current study, we developed a simple and biocompatible method for producing core-shell nanoparticles (NPs). Citrate auto combustion and green procedures were used to create core-shell Ag/CoGd0.025Er0.05Fe1.925O4 (Ag/CGEFO) sample with an average crystallite size of 26.84 nm. The prepared samples were characterized via different structural techniques, such as X-ray diffraction (XRD), Raman Spectroscopy (RS), High Resolution Transmission Electron Microscopy (HRTEM), and Energy Dispersive X-ray analysis (EDX). These analyses were utilized to characterize and confirm the successful formation of the core-shell architecture. For core–shell NPs, all peaks of Ag and CoGd0.025Er0.05Fe1.925O4 ferrite are detected in the XRD, confirming the co-presence of the ferrite spinel phase and the cubic Ag phase. The magnetic hysteresis curves demonstrate typical hard ferri-magnetic behavior along with maximum magnetic saturation values up to 53.74 emu g−1 for the CGEFO sample, while an enhanced coercivity is detected for the coated sample. Moreover, the width of the hysteresis loop is increased for the Ag/CGEFO sample compared to the uncoated one. This indicates that the addition of Ag as a shell increases magneto crystalline anisotropy (MCA). Moreover, the Eg of uncoated CGEFO is equal to 1.4 eV, increasing to 3.6 eV for coated ones. This implies the influence of CGEFO is diminished when the surface is coated with Ag (shell), and the reflectance of the Ag/CGEFO core-shell is nearly dependent on the reflectance of the Ag shell layer. Consequently, the Ag/CGEFO can be used as a light shielding substance.

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Section: Resultssupporting

confidence: 91%

Section: Introductionsupporting

confidence: 79%

Designing bi-functional Ag-CoGd_0.025Er_0.05Fe_1.925O₄ nanoarchitecture via green method

Ateia,

Elraaie,

Mohamed

2024

J. Phys. D: Appl. Phys.

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“…1C, the type IV isotherm showed an obvious hysteresis loop in the relative pressure range of 0.5–1.0, indicating the existence of mesoporous structures in Fe–N HMCS. 30 The pore size and specific surface area of Fe–N HMCS were 20 nm and 1136 m 2 g −1 , respectively. Comparatively, HMNCS displayed a pore size of 16 nm and a surface area of 1092 m 2 g −1 (Fig.…”

Section: Resultsmentioning

confidence: 95%

Fe–N hollow mesoporous carbon spheres with high oxidase-like activity for sensitive detection of alkaline phosphatase

Chen,

Zhao,

Zhang

et al. 2023

Analyst

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“…If Mr/Ms is equal or higher than 0,5 this material is considered in a single magnetic domain. If squareness is smaller than 0,5, material synthesized has a multi domain structure 35,36 . All ferrites in this work are multi domain type.…”

Section: (12)mentioning

confidence: 99%

Tunable Magnetic and Electrical Properties of Cobalt and Zinc Ferrites CO1-XZnXFe2O4 Synthesized by Combustion Route

et al. 2018

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Co and Zn ferrites with general formula CO 1-X Zn X Fe 2 O 4 (x = 0; 0,2 and 0,8) were synthesized by combustion reaction method, using urea as fuel. The structure of inverse-spinel-type ferrite were characterized through XRD using Rietveld refinement method to identify, quantify phases and determine lattice parameters. The crystallites had mean size of 37,33 nm, 43,66 nm and 51.88 nm with the increment of Zn 2+ , respectively. Samples were sintered in a resistive oven at 900 °C for 3 hours. Analysis by SEM indicated that the particles have irregular sizes and high concentration of open pores. The magnetic properties were measured using a vibrating sample magnetometer (VSM), through which a decrease in the magnetization variation was observed as the non-magnetic Zn 2+ concentration increases. The permittivity and loss tangent were determined using vector network analyzer equipment, permittivity increases with the increase of zinc concentration and the tangent loss measurements were small for all ferrites synthesized in this work.

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Modification of Co/Cu nanoferrites properties via Gd3+/Er3+doping

Cited by 25 publications

References 37 publications

Designing bi-functional Ag-CoGd_0.025Er_0.05Fe_1.925O₄ nanoarchitecture via green method

Designing bi-functional Ag-CoGd_0.025Er_0.05Fe_1.925O₄ nanoarchitecture via green method

Fe–N hollow mesoporous carbon spheres with high oxidase-like activity for sensitive detection of alkaline phosphatase

Tunable Magnetic and Electrical Properties of Cobalt and Zinc Ferrites CO1-XZnXFe2O4 Synthesized by Combustion Route

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Modification of Co/Cu nanoferrites properties via Gd3+/Er3+doping

Cited by 25 publications

References 37 publications

Designing bi-functional Ag-CoGd0.025Er0.05Fe1.925O4 nanoarchitecture via green method

Designing bi-functional Ag-CoGd0.025Er0.05Fe1.925O4 nanoarchitecture via green method

Fe–N hollow mesoporous carbon spheres with high oxidase-like activity for sensitive detection of alkaline phosphatase

Tunable Magnetic and Electrical Properties of Cobalt and Zinc Ferrites CO1-XZnXFe2O4 Synthesized by Combustion Route

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Product

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Designing bi-functional Ag-CoGd_0.025Er_0.05Fe_1.925O₄ nanoarchitecture via green method

Designing bi-functional Ag-CoGd_0.025Er_0.05Fe_1.925O₄ nanoarchitecture via green method