A detailed investigation of lanthanum substituted bismuth ferrite for enhanced structural, optical, dielectric, magnetic and ferroelectric properties

Ahmed, Ishfaq; Mustafa, Ghulam; Subhani, M. Umair; Hussain, Gulzar; Ismail, Ahmad Ghadafi; Anwar, Hafeez

doi:10.1016/j.rinp.2022.105584

Cited by 33 publications

(5 citation statements)

References 64 publications

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“…The FTIR spectra of BiFe 1– x Mn x O 3 nanostructures with x = 0, 2, and 4%, synthesized at 1000 °C for 2 h in the range of 500 to 2500 cm –1 , are presented in Figure . Metal oxide interactions such as Mn–O, Fe–O, and Bi–O are related to absorption peaks ranging from 500 to 1500 cm –1 The absorption bands at 611 and 875 cm –1 are associated with Fe–O stretching vibrations . The small bands appeared at 720 cm –1 interconnected with O–Fe–O vibrations, which demonstrates the octahedral geometry of the FeO 6 group in perovskite materials; therefore, all samples have perovskite structures. , The absorption peaks observed at 1100 and 1449 cm –1 are interlinked with CC and CO stretching vibrations, respectively .…”

Section: Resultsmentioning

confidence: 95%

“…The most vital aspect of research along this line is the fabrication of required novel materials . Among numerous transition metals, ferrites (iron oxide compounds) are an essential class of semiconductors that can be favorably used in ceramic coatings for solar cells, actuators, transformer cores, sensors, multistate memories, optoelectronic devices, and magnetic storage media. − Ferrites have been actively explored in connection with their potential applications in clay capacitors, drug delivery, computer technology, powerful arbitrary access memory, transducers, ferro fluids, high-density information storage, and cancer therapy. − Bismuth ferrite, which is a compound with the chemical formula BiFeO 3 (BFO), is one of the multiferroic materials at ambient temperature. To promote applications of bismuth ferrites in a variety of devices, it is necessary to improve their properties in a way that they have a dielectric loss, formation of an impurity phase, and a high leakage current. , It has been demonstrated that replacement at the A-site and B-site is a successful approach for decreasing dielectric loss and leakage current.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Mn Doped on Structural, Optical, and Dielectric Properties of BiFe_1–xMn_xO₃ for Efficient Antioxidant Activity

Uzair,

Kanwal,

Khan

et al. 2023

ACS Omega

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Manganese-doped bismuth ferrites were synthesized using the coprecipitation method with the green extract Azadirachta indica. Our incorporation of the transition element, manganese, into bismuth ferrites tackles the challenge of increased leakage current often observed in intrinsic bismuth ferrites. We gained key insights through a comprehensive examination of the structural, dielectric, and optical properties of these materials, utilizing Fourier transform infrared spectroscopy (FTIR), impedance spectroscopy, and UV–visible spectroscopy, respectively. The formation of an octahedral geometry was confirmed using the FTIR technique. UV–visible spectroscopy indicated that 2% Mn doping is optimal, while we obtained a low band gap energy (2.21 eV) and high refractive index (3.010) at this amount of doping. The manufactured materials exhibited the typical ferrite-like dielectric response, that is, the dielectric parameter gradually decreased as the frequency increased and then stayed constant in the high-frequency range. Using the diphenylpicrylhydrazyl (DPPH) free radical assay, we also examined the antioxidant activity of bismuth ferrites. We concluded that among different Mn-doped BiFeMnO3-based nanomaterials, the 2 wt % Mn-doped BiFeMnO3 shows the highest antioxidant activity. This finding substantiates the efficacy of the optimized material with regard to its potent antioxidant activity, positioning it as a promising candidate for potential biomedical applications.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Effect of Mn Doped on Structural, Optical, and Dielectric Properties of BiFe_1–xMn_xO₃ for Efficient Antioxidant Activity

Uzair,

Kanwal,

Khan

et al. 2023

ACS Omega

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“…The observed reduction in (E g ) for Sm content values of x = 0.06 and x = 0.10 might perhaps be attributed to the presence of energy levels caused by defects in close proximity to the conduction band. Moreover, alterations in the band gap may be credited to other variables such as structural deformation [36,37].…”

Section: Optical Propertiesmentioning

confidence: 99%

Sm-substituted Co-Mn nanoferrites: synthesis, characterization, magnetic properties and photocatalytic degradation of methylene blue

Abu-Elsaad,

Nawara

2023

Phys. Scr.

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An investigation has been performed into the influence of Sm3+ substitution on the structural, optical, and magnetic characteristics of Co0.5Mn0.5SmxFe2–xO4 (x = 0.0-0.1 and x changes at a step of 0.02) and its prospective use as an effective photocatalyst. The examination also explored the potential use of this composition as a proficient photocatalyst. The structural results verified the production of cubic spinel structures in all compositions. The determination of crystallite size has been done via the Williamson-Hall approach, taking into account the influence of strain variables. The ferrite nanoparticles’ spherical form was identified via transmission electron microscopy (TEM) examination. The Co0.5Mn0.5Fe2O4 sample exhibited a particle size distribution of around 40 nm. The optical band gap, ascertained using UV–vis-diffuse reflectance (DRS) spectra analysis, ranged from 1.38 to 1.43 eV. Vibrating sample magnetometer (VSM) analysis revealed that the produced sample was soft magnetic with moderate magnetization (58.18 emu g−1 - 42.73 emu g−1). Methylene Blue (MB) dye’s photocatalytic degradation (PCD) was used to study the photocatalytic behavior while exposed to sunlight. The Sm-doped Co-Mn nanoferrites synthesized in this study exhibit potential for use as effective active photocatalysts in the degradation of toxic industrial dyes. This application promises to enhance safety in both the environmental and healthcare sectors.

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“…The crystallite size was found in the range of 27 -41 nm as depicted in Table 1. The addition of GNP to MCCD-ferrites causes structural deformation and macrostrain [22]. Similarly equation ( 5) was used to get the X-ray density (5) where N A = 6.022 × 10 23 mol -1 , while M indicate the molecular weight of ferrite composite [23].…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Synthesis and characterizations of Mg-Cu-Co-Dy ferrites and their composites with graphene nanoplatelets (GNP)

Akhtar¹,

Hussain²,

Yusuf³

et al. 2022

JOR

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Nanocrystalline spinel ferrite Mg0.5Cu0.25Co0.25Fe1.97Dy0.03O4 (MCCD-ferrites) and their composites with graphene nanoplatelets (GNP =0.0%, 1.25% 2.5%, 3.75%, 5%) were prepared by sol-gel technique and sintered at 850 oC for 5 hours. Measurements in the areas of X-ray diffraction, electrical, optical, dielectric and magnetic properties were used to analyze the effects of the inclusion of graphene with ferrite nanoparticles. The crystallite size was determined in the range of 27.62 – 41.46 (nm). The optical bandgap was found in the range of 3.50 eV to 2.88 eV. The dielectric loss was measured between 8 Hz and 8 MHz at room temperature (RT). Magnetic characteristics of the materials are measured and calculated. The magnetic performances of MCCDF-GNP Composites nanoparticles are improved with an increase in saturation (Ms) magnetization. This material can be utilized for humidity sensors, antennae, and micro memory chips.

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A detailed investigation of lanthanum substituted bismuth ferrite for enhanced structural, optical, dielectric, magnetic and ferroelectric properties

Cited by 33 publications

References 64 publications

Effect of Mn Doped on Structural, Optical, and Dielectric Properties of BiFe_1–xMn_xO₃ for Efficient Antioxidant Activity

Effect of Mn Doped on Structural, Optical, and Dielectric Properties of BiFe_1–xMn_xO₃ for Efficient Antioxidant Activity

Sm-substituted Co-Mn nanoferrites: synthesis, characterization, magnetic properties and photocatalytic degradation of methylene blue

Synthesis and characterizations of Mg-Cu-Co-Dy ferrites and their composites with graphene nanoplatelets (GNP)

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A detailed investigation of lanthanum substituted bismuth ferrite for enhanced structural, optical, dielectric, magnetic and ferroelectric properties

Cited by 33 publications

References 64 publications

Effect of Mn Doped on Structural, Optical, and Dielectric Properties of BiFe1–xMnxO3 for Efficient Antioxidant Activity

Effect of Mn Doped on Structural, Optical, and Dielectric Properties of BiFe1–xMnxO3 for Efficient Antioxidant Activity

Sm-substituted Co-Mn nanoferrites: synthesis, characterization, magnetic properties and photocatalytic degradation of methylene blue

Synthesis and characterizations of Mg-Cu-Co-Dy ferrites and their composites with graphene nanoplatelets (GNP)

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Product

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Effect of Mn Doped on Structural, Optical, and Dielectric Properties of BiFe_1–xMn_xO₃ for Efficient Antioxidant Activity

Effect of Mn Doped on Structural, Optical, and Dielectric Properties of BiFe_1–xMn_xO₃ for Efficient Antioxidant Activity