Structural and magnetic properties of hydrothermally synthesized Bi-substituted Ni–Co nanosized spinel ferrites

Alqarni, Ameerah N.; Almessiere, M.A.; Güner, S.; Sertkol, M.; Shirsath, Sagar E.; Tashkandi, N.; Baykal, A.

doi:10.1016/j.ceramint.2021.11.089

Cited by 31 publications

(9 citation statements)

References 33 publications

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“…The net magnetic moment of CoFe 2 O 4 is attributed to the difference in magnetic moments of the cations from the octahedral site and the tetrahedral site Figure b shows the net magnetic moment of CoFe 2 O 4 as a function of Er content.…”

Section: Resultsmentioning

confidence: 99%

“…39,40 The net magnetic moment of CoFe 2 O 4 is attributed to the difference in magnetic moments of the cations from the octahedral site and the tetrahedral site. 19 Figure 11b shows the net magnetic moment of CoFe 2 O 4 as a function of Er content. Because Er 3+ has a higher magnetic moment than Fe 3+ , 3 thus the magnetic moment increases with increasing Er content.…”

Section: = + +mentioning

confidence: 99%

“…Different synthesis techniques such as sol–gel, ,, sol–gel-assisted auto combustion, microemulsion, , sonochemical, co-precipitation, , and hydrothermal have been used to synthesize nanocrystalline Co spinel ferrites. Among them, the sol–gel route is convenient due to its easy preparation, cost effectiveness, and better control of size .…”

Section: Introductionmentioning

confidence: 99%

“…11 Besides, doping of rare earth ions such as Ce− Dy, Dy 3+ −Y 3+ , Ce−Nd, 6−8 Y 3+ , Ho 3+ , Sm 3+ , Nd 3+ , and Er 3+ into the ferrite has changed the structural and magnetic parameters. 12 Different synthesis techniques such as sol−gel, 4,13,14 sol−gelassisted auto combustion, 3 microemulsion, 15,16 sonochemical, 7 co-precipitation, 17,18 and hydrothermal 19 have been used to synthesize nanocrystalline Co spinel ferrites. Among them, the sol−gel route is convenient due to its easy preparation, cost effectiveness, and better control of size.…”

Section: Introductionmentioning

confidence: 99%

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Sol–Gel Route for the Synthesis of CoFe_2–xEr_xO₄ Nanocrystalline Ferrites and the Investigation of Structural and Magnetic Properties for Magnetic Device Applications

et al. 2022

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This study reports the formation of Er-doped nanocrystalline cobalt ferrite with the formula CoFe 2– x Er x O 4 (0.0 ≤ x ≤ 0.10) from nontoxic metal precursors Co(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 ·9H 2 O, and Er(NO 3 ) 3 ·5H 2 O through an easy and economical sol–gel route in which citric acid is served as the chelating agent. The as-prepared powder was annealed at 700 °C for 3 h in ambient air to get the required spinel structure. The annealed samples were subjected to structural and magnetic characterization. The X-ray diffraction (XRD) data of the samples confirmed the cubic spinel structure formation. The average crystallite size evaluated from XRD data increased from 21 to 34 nm with the substitution of Er due to the larger atomic size of Er 3+ than Fe 3+ . Moreover, the crystallite size obtained from XRD data are well matched with the particle size measured from transmission electron microscopy images. The lattice parameters obtained from XRD data agree well with the values estimated from theoretical cation distribution and Rietveld refinement calculation. The hysteresis curve exhibits the particles are soft ferromagnetic and the coercivity increased from 54.7 to 76.6 kA/m with maximum saturation magnetization, M s = 61 emug –1 for 0.10 Er content. The squareness ratios were found to be less than 0.5, which indicates the single-domain nature of our particles. The blocking temperature measured from field cooled-zero field cooled curves is T B > 350 K for all the samples, which is much higher than the room temperature (300 K). The enhancement of saturation magnetization and coercivity has been explained based on the crystallite size, anisotropy constant, and cation distribution. Thus, the structural and magnetic properties of CoFe 2 O 4 nanoparticles (NPs) can be tuned by Er incorporation and these NPs can be applied in different soft magnetic devices.

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Section: Resultsmentioning

confidence: 99%

Section: = + +mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sol–Gel Route for the Synthesis of CoFe_2–xEr_xO₄ Nanocrystalline Ferrites and the Investigation of Structural and Magnetic Properties for Magnetic Device Applications

et al. 2022

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“…They observed a considerable decrease in coercivity and magnetization with increase in La 3+ . Kamran et al improved the transport properties of Ce-doped CoFe 2 O 4 for resistive random access memory (RAM) applications. − They concluded that the electrical conductivity decreases with increasing Ce 3+ ions.…”

Section: Introductionmentioning

confidence: 99%

Impact of Sm³⁺ and Er³⁺ Cations on the Structural, Optical, and Magnetic Traits of Spinel Cobalt Ferrite Nanoparticles: Comparison Investigation

et al. 2022

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In this study, we investigated a comparison of the structure, morphology, optic, and magnetic (room temperature (RT)) features of Er3+ and Sm3+ codoped CoFe2O4 (CoErSm) nanospinel ferrite (NSFs) (x ≤ 0.05) synthesized via hydrothermal (H-CoErSm NSFs) and sonochemical (S-CoErSm NSFs) approaches. The formation of all products via both synthesis methods has been validated by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM), along with energy-dispersive X-ray (EDX) and transmission electron microscopy (TEM) techniques. The single phase of the spinel structure (except for the Hyd sample with x = 0.03) was evidenced by XRD analysis. The D XRD (crystallite size) values of H-CoErSm and S-CoErSm NSFs are in the 10–14.7 and 10–16 nm ranges, respectively. TEM analysis presented the cubic morphology of all products. A UV–visible percent diffuse reflectance (DR %) study was performed on all products, and E g (direct optical energy band gap) values varying in the 1.32–1.48 eV range were projected from the Tauc plots. The data of RT magnetization demonstrated that all prepared samples are ferromagnetic in nature. M–H data revealed that rising the contents of cosubstituent elements (Sm3+ and Er3+ ions) caused an increase in M s (saturation magnetization) and H c (coercive field) in comparison to pristine samples. Although concentration dependence is significant (x > 0.02), no strict regularity (roughly fluctuating) has been ruled out in M s values for doped samples prepared via the hydrothermal method. However, sonochemically prepared samples demonstrated that M s values increase with increasing x up to x = 0.04 and then decrease with the further rise in cosubstituent Sm3+ and Er3+ ions. The calculated values of M s and H c were found to be greater in H-CoErSm NSFs compared to those in S-CoErSm NSFs. The present investigation established that the distribution of cations and the variation in crystallite/particle sizes are efficient to control the intrinsic properties of all samples.

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Effect of rare earth ions (RE = La3+, Sm3+, Nd3+, and Gd3+) substitution on structural, magnetic properties, and dc electrical resistivity of Co0.5Ni0.5Fe2O4 ferrite

Kumar,

Suryanarayana,

Vemula

et al. 2023

Appl. Phys. A

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Structural and magnetic properties of hydrothermally synthesized Bi-substituted Ni–Co nanosized spinel ferrites

Cited by 31 publications

References 33 publications

Sol–Gel Route for the Synthesis of CoFe_2–xEr_xO₄ Nanocrystalline Ferrites and the Investigation of Structural and Magnetic Properties for Magnetic Device Applications

Sol–Gel Route for the Synthesis of CoFe_2–xEr_xO₄ Nanocrystalline Ferrites and the Investigation of Structural and Magnetic Properties for Magnetic Device Applications

Impact of Sm³⁺ and Er³⁺ Cations on the Structural, Optical, and Magnetic Traits of Spinel Cobalt Ferrite Nanoparticles: Comparison Investigation

Effect of rare earth ions (RE = La3+, Sm3+, Nd3+, and Gd3+) substitution on structural, magnetic properties, and dc electrical resistivity of Co0.5Ni0.5Fe2O4 ferrite

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Structural and magnetic properties of hydrothermally synthesized Bi-substituted Ni–Co nanosized spinel ferrites

Cited by 31 publications

References 33 publications

Sol–Gel Route for the Synthesis of CoFe2–xErxO4 Nanocrystalline Ferrites and the Investigation of Structural and Magnetic Properties for Magnetic Device Applications

Sol–Gel Route for the Synthesis of CoFe2–xErxO4 Nanocrystalline Ferrites and the Investigation of Structural and Magnetic Properties for Magnetic Device Applications

Impact of Sm3+ and Er3+ Cations on the Structural, Optical, and Magnetic Traits of Spinel Cobalt Ferrite Nanoparticles: Comparison Investigation

Effect of rare earth ions (RE = La3+, Sm3+, Nd3+, and Gd3+) substitution on structural, magnetic properties, and dc electrical resistivity of Co0.5Ni0.5Fe2O4 ferrite

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Sol–Gel Route for the Synthesis of CoFe_2–xEr_xO₄ Nanocrystalline Ferrites and the Investigation of Structural and Magnetic Properties for Magnetic Device Applications

Sol–Gel Route for the Synthesis of CoFe_2–xEr_xO₄ Nanocrystalline Ferrites and the Investigation of Structural and Magnetic Properties for Magnetic Device Applications

Impact of Sm³⁺ and Er³⁺ Cations on the Structural, Optical, and Magnetic Traits of Spinel Cobalt Ferrite Nanoparticles: Comparison Investigation