Multiferroic Eu doped BiFeO3 microparticle polymer composites as materials for laser induced gratings

Bahraoui, T. El; Taïbi, M.; El-Naggar, A.M.; Tlemçani, Taoufik Slimani; Albassam, A.A.; Abd‐Lefdil, M.; Kityk, I.V.; Alzayed, Nasser S.; Fedorchuk, A.O.

doi:10.1007/s10854-015-3671-2

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…This behavior can be attributed to the replacement of Bi 3+ ions (ionic radius of Bi 3+ 1.17 Å) by Eu 3+ ions, with much smaller ionic radius (1.07 Å), into the lattice of BFO. The grains sizes determined from TEM measurements [6] are higher than the values computed from x-ray diffraction indicating that these grains are formed by several crystallites.…”

Section: Resultsmentioning

confidence: 64%

“…In our previous studies, we showed that europium brings about morphology modifications [6,8]. The change is evident in the grains' shape which is transformed from a near-spherical shape for BFO to an extremely non-spherical shape resulting in a hexagonal BEFO for   x 0 0.15. while the micrograph for 20% substitution reveals numerous morphologies in this sample.…”

Section: Resultsmentioning

confidence: 93%

“…The x-ray diffraction results of BEFO (x = 0, 0.05, 0.10, 0.15 and 0.20) are shown in figure 1 indicating that the BEFO < x 0.20 compounds crystallize in the rhombohedral lattice with space group R3c (α-phase) with a transition from rhombohedral to cubic one with space group Pm3m (γ-phase) for = x 0.20 [6][7][8]. The structural parameters determined from the XRD-patterns are listed in table 1.…”

Section: Resultsmentioning

confidence: 99%

“…The substitution of Eu in Bi 1-x Eu x FeO 3 (   x 0 0.4) induces changes of the anomalies of thermal diffusion and thermal conductivity at phase transitions characterized by the appearance of minimum at the antiferromagnetic transition temperature T N and broadening at the ferroelectric transition temperature T C [5]. Bi 1-x Eu x FeO 3 , synthesized by sol-gel method and embedded into the PVA polymer matrices can be used as materials for laser induced gratings [6]. It was also observed in Bi 1-x Eu x FeO 3 that the photoinduced optical second harmonic generation, which uses two bicolor coherent laser beams incident under different angles, gave some enhancement of the SHG output near the antiferromagnetic phase transitions temperature [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Phase transitions in multiferroic Bi_1−xEu_xFeO₃ synthesized by sol-gel method

El-Bey¹,

Dinia²,

Bahraoui³

et al. 2023

Phys. Scr.

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Bi1-xEuxFeO3 micropowders 0≤x≤0.20 were synthesized by sol-gel method. X-ray diffraction shows that the crystal structure of the samples changes from rhombohedral to cubic symmetry at x=0.20. Dielectric properties and loss factor were investigated as a function of temperature. Neel temperature T_N of the compounds was measured by differential scanning calorimetry and found to decrease from 668 K to 646 K for 0≤x≤0.15 and bounce to 667 K for x=0.20. The Curie temperature TC which corresponds to the transition from ferroelectric to paraelectric phases was checked out using differential thermal analysis (DTA) measurements. The TC value increases from 1130 K to 1135 K for 0≤x≤0.15 while no transition was detected for x=0.20 in accordance with the structural transition from R3c phase to centrosymmetric Pm3m phase.

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Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phase transitions in multiferroic Bi_1−xEu_xFeO₃ synthesized by sol-gel method

El-Bey¹,

Dinia²,

Bahraoui³

et al. 2023

Phys. Scr.

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“…Multiferroic nanostructures have attracted lots of attention by researchers due to their unique benefits compared with bulk multiferroics. The interface between the piezoelectric phase and the ferromagnetic phase is well established and leads to a high magnetoelectric coupling effect by reducing the coupling loss [17,18].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Mn0.5Zn0.5SmxEuxFe1.8−2xO4 Nanoparticles via the Hydrothermal Approach Induced Anti-Cancer and Anti-Bacterial Activities

et al. 2019

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Manganese metallic nanoparticles are attractive materials for various biological and medical applications. In the present study, we synthesized unique Mn0.5Zn0.5SmxEuxFe1.8−2xO4 (0.01 ≤ x ≤ 0.05) nanoparticles (NPs) by using the hydrothermal approach. The structure and surface morphology of the products were determined by X-ray powder diffraction (XRD), transmission electron and scanning electron microcopies (TEM and SEM), along with energy dispersive X-ray spectroscopy (EDX). We evaluated the impact of Mn0.5Zn0.5SmxEuxFe1.8−2xO4 NPs on both human embryonic stem cells (HEK-293) (normal cells) and human colon carcinoma cells (HCT-116) (cancerous cells). We found that post-48 h of treatment of all products showed a significant decline in the cancer cell population as revealed by microscopically and the (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) tetrazolium (MTT) assay. The inhibitory concentration (IC50) values of the products ranged between 0.75 and 2.25 µg/mL. When tested on normal and healthy cells (HEK-293), we found that the treatment of products did not produce any effects on the normal cells, which suggests that all products selectively targeted the cancerous cells. The anti-bacterial properties of the samples were also evaluated by Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) assays, which showed that products also inhibited the bacterial growth.

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