Structural and multiferroic properties of barium substituted bismuth ferrite nanocrystallites prepared by sol–gel method

ANJU, -; Agarwal, Ashish; Aghamkar, P.; Lal, Bhajan

doi:10.1016/j.jmmm.2016.09.103

Cited by 29 publications

(9 citation statements)

References 24 publications

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“…Figure 1(b) shows the FTIR spectra of BaFe 12 O 19 and Si‐BaFe 12 O 19 powder. It was found that both samples showed two strong absorption peaks at around 442 and 595 cm −1 assigned to FeO vibration and FeO stretching vibrations, respectively 22 . The Si‐BaFe 12 O 19 was confirmed by absorption peaks at around 1127 and 1049 cm −1 assigned to SiOH and SiOSi groups 23 and absorption peaks at around 3417 and 1630 cm −1 assigned to NH stretching and NH bending vibrations of the amine group, respectively 24 …”

Section: Resultsmentioning

confidence: 90%

“…showed two strong absorption peaks at around 442 and 595 cm À1 assigned to Fe O vibration and Fe O stretching vibrations, respectively. 22 The Si-BaFe 12 O 19 was confirmed by absorption peaks at around 1127 and 1049 cm À1 assigned to SiO H and Si O Si groups 23 and absorption peaks at around 3417 and 1630 cm À1 assigned to N H stretching and N H bending vibrations of the amine group, respectively. 24 The surface morphology of BaFe 12 O 19 and Si-BaFe 12 O 19 is shown in Figures 2(a),(b), respectively.…”

Section: Characterization Of Magnetic Composite Filamentmentioning

confidence: 92%

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Effect of silane coupling on the properties of polylactic acid/barium ferrite magnetic composite filament for the 3D printing process

Sukthavorn

Phengphon

Nootsuwan

et al. 2021

J of Applied Polymer Sci

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Poly(lactic acid) (PLA)/barium ferrite (BaFe12O19) with different composition ratios was fabricated by magnetic composite filaments using an extrusion process for a 3D printer. The silane modified surface of BaFe12O19 was studied to observe the effect on the mechanical, morphology, thermal, and magnetic properties of magnetic composite filaments. The results showed that the silane treated surface BaFe12O19 not only enhanced the mechanical properties of magnetic composite filaments, but also improved adhesion and homogeneity between the BaFe12O19 filler and PLA matrix. Moreover, the thermal and magnetic properties of magnetic composite filaments were not obviously changed after adding silane treated surface BaFe12O19. The achievement of the magnetic composite filaments preparation with silane treated surface BaFe12O19 for the 3D printing process could become a guideline to develop and design other magnetic composites products in the near future.

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Section: Resultsmentioning

confidence: 90%

Section: Characterization Of Magnetic Composite Filamentmentioning

confidence: 92%

Effect of silane coupling on the properties of polylactic acid/barium ferrite magnetic composite filament for the 3D printing process

Sukthavorn

Phengphon

Nootsuwan

et al. 2021

J of Applied Polymer Sci

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“…These indicate that the intrinsic perovskite structures transform from the rhombohedral phase ( R 3 c ) into orthorhombic phase ( Pbnm ) by the doping of Ho/Ho and Ti, which show that the Bi (1.08 Å) and Fe (0.645 Å) sites are replaced by smaller ionic radius elements Ho (1.015 Å) and Ti (0.605 Å). , As x further increases up to 0.15 and 0.20, the diffraction peaks widen gradually, owing to the occurrence of structure transition from the rhombohedral ( R 3 c ) phase to a mixed state of cubic ( Pm 3̅ m ) and orthorhombic ( Pbnm ) phases. This is ascribed to the lattice distortion of BFO caused by the increase in chemical pressure of Ho and Ti. ,, The structural stability of the doped samples by Goldsmith tolerance factor ( t ) of the perovskite structure was reckoned by using this formula …”

Section: Resultsmentioning

confidence: 99%

Ho and Ti Co-Substitution Tailored Structural Phase Transition and Enhanced Magnetic Properties of BiFeO₃ Thin Films

Sun

Bai

et al. 2020

ACS Omega

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The polycrystalline thin films of BiFeO3 (BFO) and Bi0.90Ho0.10Fe1–xTixO (x = 0, 0.025, 0.05, 0.10, 0.15, and 0.20) were successfully synthesized by the simple sol–gel method. X-ray diffraction and Raman spectra revealed the substitution of Bi and Fe by Ho and Ti, respectively, and correspondingly a structural phase transition from the rhombohedral phase to orthorhombic phase. The field-emission scanning electron microscopy and transmission electron microscopy images indicated that the average size of the particles was decreased and the surface homogeneous agglomeration was enhanced with the increased concentration of Ti to x = 0.05. The X-ray photoelectron spectroscopy measurements illustrated that Fe3+ and O2– ions tended to increase with the Ti concentration increase, which accounted for the enhanced super-exchange interaction between Fe3+ and O2–. Because of the reduced concentration of oxygen vacancies, Ho and Ti ions with a smaller ionic radius and denser surface structure, the Ho and Ti co-substituted films with an appropriate concentration of Ti (x = 0.05) showed an optimal saturation magnetization (M s) of 44.23 emu/cm3 and remanent magnetization (M r) of 4.62 emu/cm3, which were approximately 1.8 times and 1.9 times than that of the pure BFO, respectively. This work opened up an effective way to modulate the structure and properties of BFO-based materials.

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“…[9] BFO displays a distorted rhombohedral structure and collinear anti-parallel spin arrangement of Fe ions, following zero macroscopic magnetization. [10] Spin canting of magnetic moments at the nanoparticle exterior is the origin of weak ferromagnetism or an (anti) ferromagnetic system. The weak ferromagnetism in BFO (x = 0) is due to the spin canting of magnetic moments.…”

Section: Magnetic Studiesmentioning

confidence: 99%

“…Ions of rare earth metals and alkaline earth metals (Mg, Ca, Ba, Sr, etc) have been used by many researchers to improve the multiferroic properties of BFO. [9,10] Due to the closeness in the ionic radius of strontium (1.18 Å) with bismuth (1.03 Å), Sr is the best choice of substitution at the bismuth site. From this substitution, a charge imbalance would be created that could be compensated in 3 ways: (i) creation of oxygen vacancies, (ii) charge discrepancy of Fe 3+ and Fe 5+ , and (iii) partial transformation of Fe 3+ to Fe 4+ .…”

Section: Introductionmentioning

confidence: 99%

Structural evolution-enabled BiFeO₃ modulated by strontium doping with enhanced dielectric, optical and superparamagnetic properties by a modified sol-gel method

S¹,

E²,

A³

2023

Chinese Phys. B

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Multiferroic (BFO) nanoparticles doped with strontium with general formula, Bi1‐xSrxFeO3 (x=0.0,0.3,0.5, 0.7 ) have been synthesized by modified Sol‐gel auto‐combustion process. The structural, electrical, optical, and magnetic properties of the samples are discussed. The structural analysis carried out by X‐ray powder diffraction technique shows a structural transition from rhombohedral (R‐3c) to cubic(Pm‐3m) for the doping amount of strontium(Sr) equal to x=0.3. Morphological analyses of the prepared samples are carried out using scanning electron microscopy (SEM). Frequency‐dependent dielectric constant and ac conductivity have been studied. The doped samples, having improved dielectric properties, can be used to fabricate different optoelectronic devices. Strong dielectric dispersion and broad relaxation were exhibited by all samples. Cole‐Cole plots were employed as an effective tool to study the dispersion parameters namely optical dielectric constant, static dielectric constant, relaxation time, and spreading factor. The activation energy was calculated from relaxation peaks and Cole‐Cole plots and found to be compatible with each other. The bandgap of the samples was calculated using Diffuse reflectance spectral (DRS) analysis. The sharp and strong photoluminescence in the IR region is observed in the samples similar to ZnO, which is reported for the first time. The room temperature and low‐temperature magnetization studies point towards the superparamagnetic nature of the samples with an improvement of magnetic properties with doping. Antiferromagnetic behavior of bulk bismuth ferrite transforms to superparamagnetic nature for both pure and Sr‐substituted bismuth ferrite nanoparticles due to close dimension of crystallite size with magnetic domains leading to break‐down of the frustrated spin cycloidal moment.

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Structural and multiferroic properties of barium substituted bismuth ferrite nanocrystallites prepared by sol–gel method

Cited by 29 publications

References 24 publications

Effect of silane coupling on the properties of polylactic acid/barium ferrite magnetic composite filament for the 3D printing process

Effect of silane coupling on the properties of polylactic acid/barium ferrite magnetic composite filament for the 3D printing process

Ho and Ti Co-Substitution Tailored Structural Phase Transition and Enhanced Magnetic Properties of BiFeO₃ Thin Films

Structural evolution-enabled BiFeO₃ modulated by strontium doping with enhanced dielectric, optical and superparamagnetic properties by a modified sol-gel method

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Structural and multiferroic properties of barium substituted bismuth ferrite nanocrystallites prepared by sol–gel method

Cited by 29 publications

References 24 publications

Effect of silane coupling on the properties of polylactic acid/barium ferrite magnetic composite filament for the 3D printing process

Effect of silane coupling on the properties of polylactic acid/barium ferrite magnetic composite filament for the 3D printing process

Ho and Ti Co-Substitution Tailored Structural Phase Transition and Enhanced Magnetic Properties of BiFeO3 Thin Films

Structural evolution-enabled BiFeO3 modulated by strontium doping with enhanced dielectric, optical and superparamagnetic properties by a modified sol-gel method

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Product

Resources

About

Ho and Ti Co-Substitution Tailored Structural Phase Transition and Enhanced Magnetic Properties of BiFeO₃ Thin Films

Structural evolution-enabled BiFeO₃ modulated by strontium doping with enhanced dielectric, optical and superparamagnetic properties by a modified sol-gel method