Role of Bi3+ substitution on structural, magnetic and optical properties of cobalt spinel ferrite

Anjum, Safia; Sehar, Fatima; Awan, M. S.; Zia, Rehana

doi:10.1007/s00339-016-9798-z

Cited by 29 publications

(3 citation statements)

References 32 publications

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“…The ionic radii of the tetrahedral (r A ) and octahedral (r B ) sites, hopping lengths L A and L B of the magnetic ions at the tetrahedral and octahedral sites, tetrahedral and octahedral bond lengths (d AX and d BX ), tetrahedral edge length (d AXE ), and octahedral shared and unshared edge length (d BXE and d BXEU ) were calculated using the following equations and are listed in Table 1 [32][33][34]:…”

Section: Xrdmentioning

confidence: 99%

Tuning of Structural, Dielectric, and Electronic Properties of Cu Doped Co–Zn Ferrite Nanoparticles for Multilayer Inductor Chip Applications

et al. 2021

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Herein, we report the synthesis of nanoparticles and doping of Cu-doped Co–Zn ferrites using the auto-combustion sol–gel synthesis technique. X-ray diffraction studies confirmed the single-phase structure of the samples with space group Fd3m and crystallite size in the range of 20.57–32.69 nm. Transmission electron microscopy micrographs and selected area electron diffraction patterns confirmed the polycrystalline nature of the ferrite nanoparticles. Energy-dispersive X-ray spectroscopy revealed the elemental composition in the absence of any impurity phases. Fourier-transform infrared studies showed the presence of two prominent peaks at approximately 420 cm−1 and 580 cm−1, showing metal–oxygen stretching and the formation of ferrite composite. X-ray photoelectron spectroscopy was employed to determine the oxidation states of Fe, Co, Zn, and Cu and O vacancies based on which cationic distributions at tetrahedral and octahedral sites are proposed. Dielectric spectroscopy showed that the samples exhibit Maxwell–Wagner interfacial polarization, which decreases as the frequency of the applied field increases. The dielectric loss of the samples was less than 1, confirming that the samples can be used for the fabrication of multilayer inductor chips. The ac conductivity of the samples increased with increasing doping and with frequency, and this has been explained by the hopping model. The hysteresis loops revealed that coercivity decreases slightly with doping, while the highest saturation magnetization of 55.61 emu/g was obtained when x = 0.1. The magnetic anisotropic constant was found to be less than 0.5, which suggests that the samples exhibit uniaxial anisotropy rather than cubic anisotropy. The squareness ratio indicates that the samples are useful in high-frequency applications.

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Section: Xrdmentioning

confidence: 99%

Tuning of Structural, Dielectric, and Electronic Properties of Cu Doped Co–Zn Ferrite Nanoparticles for Multilayer Inductor Chip Applications

et al. 2021

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“…The observed three diffraction peaks are corresponding to the lattice planes of (111), ( 220) and (311) and confirmed that the Cd 0.9-x Zn 0.1 Bi x S QDs possessed a cubic structure. The diffraction peaks corresponding to the cubic phase were matched with JCPDS file number 10-454 [19].…”

Section: Structural Analysismentioning

confidence: 99%

Role of Bi3+ ions on structural, optical, photoluminescence and electrical performance of Cd0.9-xZn0.1BixS QDs

et al. 2021

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In this work, the Cd0.9-xZn0.1BixS QDs with different compositions of Bi3+ ions (0 ≤ x ≤ 0.05) were synthesized using a facile chemical route. The prepared QDs were characterized for analyzing the structural, morphological, elemental, optical, band gap, photoluminescence and electrochemical properties. XRD results confirmed that the Cd0.9-xZn0.1BixS QDs have a cubic structure. The mean crystallite size was increased from ~ 2 to ~ 5 nm for the increase of Bi3+ ions concentration. The optical transmittance behavior was decreased with increasing Bi3+ ions. The scanning electron microscope images showed that the prepared QDs possessed agglomerated morphology and the EDAX confirmed the presence of doped elements as per stoichiometry ratio. The optical band gap was slightly blue-shifted for initial substitution (Bi3+ = 1%) of Bi3+ ions and red-shifted for further increase of Bi3+ compositions. The optical band gap was ranged between 3.76 and 4.0 eV. High intense red emission was received for Bi3+ (1%) doped Zn:CdS QDs. The red emission peaks were shifted to a higher wavelength side due to the addition of Bi3+ ions. The PL emission on UV-region was raised for Bi3+ (1%) and it was diminished. Further, a violet (422 nm) and blue (460 nm) emission were received for Bi3+ ions doping. The cyclic voltammetry analysis showed that Bi3+ (0%) possessed better electrical properties than other compositions of Bi3+ ions.

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“…From some of these studies, changes in the magnetic properties of cobalt ferrite depend on the selection of doping material, so that it can be modified for certain purposes as it is maintain the miscroscopic and macroscopic parameters. Meanwhile, research on the effects of Bi 3+ doping in ferrit cobalt particles is relatively small (Anjum et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Effect of bismuth substitution on magnetic properties of CoFe2O3 nanoparticles: Study of synthesize using coprecipitation method

Saputro

Utari

Purnama

2019

J. Phys.: Theor. Appl.

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Abstract: The effect of bismuth ion substitution on the magnetic properties of cobalt ferrite nanoparticles was identified in this study. This method used in this study was coprecipitation method using 0.1 bismuth ion concentration. The results on hysteresis loop showed that the saturation magnetization of cobalt ferrite nanoparticles decreased with the substitution of bismuth ions, but the coercive field experienced the opposite. Saturation magnetization decreased from 57.97 to 51.19 emu / g, while coercive fields increased from 0.64 to 0.84 kOe.

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Role of Bi3+ substitution on structural, magnetic and optical properties of cobalt spinel ferrite

Cited by 29 publications

References 32 publications

Tuning of Structural, Dielectric, and Electronic Properties of Cu Doped Co–Zn Ferrite Nanoparticles for Multilayer Inductor Chip Applications

Tuning of Structural, Dielectric, and Electronic Properties of Cu Doped Co–Zn Ferrite Nanoparticles for Multilayer Inductor Chip Applications

Role of Bi3+ ions on structural, optical, photoluminescence and electrical performance of Cd0.9-xZn0.1BixS QDs

Effect of bismuth substitution on magnetic properties of CoFe2O3 nanoparticles: Study of synthesize using coprecipitation method

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