Influence of Nd3+ substituted Co0.5Ni0.5Fe2O4 ferrite on structural, morphological, dc electrical resistivity and magnetic properties

Kumar, Sanjay; Priya, G. Vishnu; Aruna, B.; Raju, M.; Parajuli, D.; Murali, N.; Verma, Ritesh; Batoo, Khalid Mujasam; Kumar, Rajesh; Narayana, P.V. Lakshmi

doi:10.1016/j.inoche.2021.109132

Cited by 24 publications

(6 citation statements)

References 44 publications

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“…The insignificant change in the resistivity of x = 0.09 samples might be due to the excess Dy forming the additional orthoferrites phase, which restricts the hopping mechanism. The increase in the resistivity parameter of ferrites with rare Earth substitution is observed by other researchers 45,46 for a small addition of substitution.…”

Section: Resultssupporting

confidence: 65%

Impact of Process Parameters and Dopant Concentration on Structural, Magnetic, and Dielectric Properties of Dysprosium-doped Nickel-Zinc Ferrites Synthesized by Microwave Hydrothermal Method

Ramesh,

Usha,

Neelima

et al. 2023

ECS J. Solid State Sci. Technol.

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This study aims to investigate the impact of substituting Dy3+ ions on the structural, magnetic and dielectric properties of Nickel Zinc (Ni-Zn) ferrites, which have the chemical formula Ni0.5Zn0.5DyxFe2-xO4 (where x = 0, 0.01, 0.03, 0.05, 0.07, and 0.09). These ferrites were synthesized using a microwave hydrothermal technique with different process parameters. Structural characterization of the synthesized powders was carried out using X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR). The XRD analysis confirmed the presence of a pure spinel phase for Dy concentrations (x) up to 0.05. However, when x ≥ 0.07, an additional orthoferrite phase (DyFeO3) was observed along with the spinel phase. FTIR spectra revealed a shift in low-frequency wave numbers due to Dy3+ ion substitution. The size and morphology of the synthesized powder particles were examined using field emission scanning electron microscopy (FESEM). The powder compacts were sintered using microwave processing at 900 °C for 40 min. The increase in dc. resistivity is observed with an increase in Dy3+ concentration, mainly due to the change in the hopping mechanism with the substitution concentration. Dielectric properties such as dielectric constant and loss are measured in the frequency range of 100 Hz to 1.8 GHz. The high value of dielectric constant and loss observed in the low-frequency region compared to the high-frequency region. Maxwell’s Wagner model and ‘Koop’s theory explains the variation in dielectric properties with the frequency. The magnetic hysteresis loops were measured at different temperatures and observed to enhance the low-temperature magnetic properties compared to room temperature. The results suggest that the magnetic and dielectric properties of the investigated samples can be adjusted by varying the concentration of Dy3+ ions, providing the ability to tailor these properties according to specific application requirements.

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Section: Resultssupporting

confidence: 65%

Impact of Process Parameters and Dopant Concentration on Structural, Magnetic, and Dielectric Properties of Dysprosium-doped Nickel-Zinc Ferrites Synthesized by Microwave Hydrothermal Method

Ramesh,

Usha,

Neelima

et al. 2023

ECS J. Solid State Sci. Technol.

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“…No impurity peaks were observed. The XRD result confirms the synthesis of Cu 2+ ions substituted magnesium ferrites with phase purity and small crystallite size [16]. The lattice constants of the synthesized samples were calculated by using the equation below (equation ( 1)) and the values of lattice constant(a) for the synthesized ferrite samples are reported in Table 1 below.…”

Section: Identification and Interpretation Of Crystal Structure By X-...supporting

confidence: 58%

Effect of Copper Doping on the Structural, Electrical, and Magnetic Properties of Mg-Co Ferrites

et al. 2024

Preprint

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This research paper focuses on the synthesis and characterization of Cu-doped Mg-Co ferrites with varying compositions (Mg0.6-xCo0.4CuxFe2O4, where x = 0.0, 0.1, 0.2, and 0.3) using a solid-state reaction method. This paper also investigates the structural, morphological, magnetic, and electrical characteristics of synthesized Mg0.6-xCo0.4CuxFe2O4, where x = 0.0, 0.1, 0.2, and 0.3. The X-ray diffraction (XRD) technique confirms the ferrites spinel structure in the Fd-3m space group, with average crystallite sizes ranging from 57.29 to 48.57 nm. Fourier Transform Infrared (FTIR) spectroscopy verifies chemical and structural changes, while scanning electron microscopy (SEM) reveals cubic crystal growth with an average grain size of 1 to 1.5 μm. DC electrical resistivity decreases with increasing temperature and Cu2+ substitution, ranging from 1.4 x 106 Ω-cm to 6.7 x 105 Ω-cm. The study suggests a correlation between resistivity and Cu2+ concentration. Magnetic behaviour, studied using a Vibrating Sample Magnetometer (VSM), shows dependence on dopant concentration, with coercivity ranging from 157 Oe to 256 Oe. The results indicate potential applications in magnetic storage devices, antennas, transformers, and high-frequency electronics.

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“…The value of σ S decreases with an increase in the doping of nickel ion ( x = 0.0 to x = 1.0) from 67.69 to 41.07 emu/g due to the high magnetic moment (5 μB) of cobalt ferrite replaced by the lower magnetic moment (4 μB) of nickel ferrite. Kumar et al (2022) observed that the saturation magnetization of cobalt‐nickel ferrite was 51.22 emu/g which further increases to 56.33 emu/g with Nd 3+ ions doping, whereas the dc resistivity further increased to 0.62 eV 59 . They stated that at 50% concentration of Ni and Co, the ions occupy the octahedral position which results in the improved saturation magnetization value.…”

Section: Resultsmentioning

confidence: 99%

“…Kumar et al (2022) observed that the saturation magnetization of cobalt-nickel ferrite was 51.22 emu/g which further increases to 56.33 emu/g with Nd 3+ ions doping, whereas the dc resistivity further increased to 0.62 eV. 59 They stated that at 50% concentration of Ni and Co, the ions occupy the octahedral position which results in the improved saturation magnetization value. The value of coercivity decreases with the nickel doping from 2.16 to 0.48 kOe as nickel has low magneto crystalline anisotropy.…”

Section: Magnetic Studiesmentioning

confidence: 99%

Green‐synthesis of Ni‐Co nanoferrites using aloe vera extract: Structural, optical, magnetic, and antimicrobial studies

Dhanda

Thakur

Kumar

et al. 2023

Applied Organom Chemis

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Nickel-doped cobalt nanoferrites (Ni x Co 1-x Fe 2 O 4 , where x = 0.0 to 1.0 with step size 0.2) were prepared using the auto combustion method in which aloe vera extract was taken as a fuel. Further, characterization for antimicrobial, structural, optical, and magnetic studies was performed for the prepared ferrite nanoparticles. Antimicrobial activity was assessed against a prevalent human fungal pathogen, Candida albicans. The X-ray diffraction (XRD) pattern confirmed the spinel cubic phase with an average crystallite size of 28 nm. The Fourier transform infrared spectroscopy (FTIR) confirmed the stretching mode of vibration at the tetrahedral and the octahedral sites. Further, the analysis of magnetic properties was done using vibrating sample magnetometer (VSM), and the magnetic parameters, specific magnetization (67.69 emu/g) as well as squareness ratio σ R /σ S (0.47) were observed. From the UV-Visible absorbance spectra, the absorbance band edge was observed between 700 and 800 nm, and band gap values were observed at 2.84 eV for x = 1.0. Furthermore, the antimicrobial studies of the obtained ferrite nanoparticles were inspected against the C. albicans fungi, and it was observed that nickel-doped cobalt ferrite shows an inhibitory nature. Maximum inhibition of 0.43 (67% growth) was observed for the composition x = 1.0. Therefore, these ferrite nanoparticles can be used as a drug against fungus infection.aloe vera, Candida albicans, cobalt ferrite, nickel ferrite, XRD | INTRODUCTIONFerrite nanoparticles get much more attention from researchers due to their unique chemical, optical, electrical and magnetic properties. [1][2][3][4] Spinel ferrites are the magnetic particles with the formula MFe 2 O 4 (whereas M represents Zn, Ni, Mn, Co, etc.) used in varied fields like magnetic sensing, data storage, ferrofluid, converters, magneto-optical recording, antennas, humidity sensors, energy storage devices, inductors, and microwave devices. [5][6][7][8] In the scientific world, magnetic nanoparticles attained more interest because of their valuable applications in medical fields like MRI, drug delivery, hyperthermia, ferrofluids, medical diagnostics, and cancer therapy. [9][10][11] The targeting and colloidal stability of nanostructure could be enhanced with the larger sensitivity of nanoparticles and this sensitivity depends on the ratio of surface area to the volume. 12 The nanoparticles have also been used for the waste water treatment and dye degradation property. [13][14][15][16] The properties of

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Influence of Nd3+ substituted Co0.5Ni0.5Fe2O4 ferrite on structural, morphological, dc electrical resistivity and magnetic properties

Cited by 24 publications

References 44 publications

Impact of Process Parameters and Dopant Concentration on Structural, Magnetic, and Dielectric Properties of Dysprosium-doped Nickel-Zinc Ferrites Synthesized by Microwave Hydrothermal Method

Impact of Process Parameters and Dopant Concentration on Structural, Magnetic, and Dielectric Properties of Dysprosium-doped Nickel-Zinc Ferrites Synthesized by Microwave Hydrothermal Method

Effect of Copper Doping on the Structural, Electrical, and Magnetic Properties of Mg-Co Ferrites

Green‐synthesis of Ni‐Co nanoferrites using aloe vera extract: Structural, optical, magnetic, and antimicrobial studies

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