Bi1−xEuxFeO3 Powders: Synthesis, Characterization, Magnetic and Photoluminescence Properties

Surdu, Vasile–Adrian; Trușcă, Roxana; Vasile, Bogdan Ştefan; Oprea, Ovidiu; Tanasă, Eugenia; Diamandescu, L.; Andronescu, Ecaterina; Ianculescu, Adelina

doi:10.3390/nano9101465

Cited by 13 publications

(6 citation statements)

References 53 publications

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“…Chemical modifications of one of the most known type-I multiferroics, bismuth ferrite [1], make it possible to tune the properties of the parent composition (e.g., to adjust the ranges of the antiferromagnetic and the ferroelectric phase transitions) and to obtain new crystalline and magnetic structures [2,3]. While bulk single-phase perovskites with considerable and even complete isovalent substitutions of bismuth in BiFeO 3 can be easy produced using the conventional ceramic routes [4][5][6], Crystals 2020, 10, 950 2 of 10 the formation of the compositions with more than 15 mol.% substitution of iron (except for Mn 3+ substituted BiFeO 3 where up to mol.% can be achieved [7]) requires a high-pressure synthesis.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Diagram of the High-Pressure Stabilized Multiferroic Perovskites of the BiFe1-yScyO3 Series

et al. 2020

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Magnetic properties of the high-pressure stabilized perovskite BiFe1-yScyO3 phases (0.1 ≤ y ≤ 0.9) have been studied by means of magnetization measurements and neutron diffraction. The metastable perovskites of this series undergo irreversible polymorphic transformations upon annealing, the phenomenon referred to as conversion polymorphism. It has been found that the solid solutions with y ≥ 0.70 exhibit no long-range magnetic ordering regardless of their polymorph modification, while those with y ≤ 0.60 are all antiferromagnets. Depending on the scandium content, temperature and structural distortions, three types of the antiferromagnetic orderings, involving collinear, canted and cycloidal spin arrangements, have been revealed in the phases obtained via conversion polymorphism and the corresponding magnetic phase diagram has been suggested.

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Section: Introductionmentioning

confidence: 99%

Magnetic Diagram of the High-Pressure Stabilized Multiferroic Perovskites of the BiFe1-yScyO3 Series

et al. 2020

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“…Therefore, the decrease in lattice parameters and crystal size L XRD is also more invident with increasing Eu content, as shown in Table I. The report of Park et al 14 and Surdu et al 15 also indicated that the crystal lattice parameters change due to the fact that ionic radius of rare Earth ions are smaller than that of Bi 3+ ion.…”

Section: Resultsmentioning

confidence: 77%

Microstructure and Physical Properties of (Eu, Ni) Co-Doped BiFeO₃ Materials

Thang

Hùng

Khang

et al. 2023

ECS J. Solid State Sci. Technol.

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BiFeO3 (BFO) and Bi1-xEuxFe0.975Ni0.025O3 (x = 0, 0.025, 0.05, 0.075, 0.10) materials were synthesized by sol-gel method. The structural, optical, ferromagnetic, and ferroelectric properties of all samples were systematically investigated using different techniques. X-ray diffraction showed that all samples were crystallized in the rhombohedral structure with R3C space group. The crystal lattice parameters were a = 5.563 Å and c = 13.833 Å, and crystal size was LXRD = 519 Å for BiFeO3 materials, whereas the a, c, and LXRD of (Eu, Ni) co-doped samples decreased with Eu concentration. Raman scattering spectra were used to confirm the substitution of Eu3+ ions into Bi-sites. Fluorescence spectra showed the enhancement of characteristic emission peaks with Eu concentration. The BFO exhibited weak ferroelectric behavior with a maximum polarization of Ps = 12.698 µC/cm2 and remnant polarization of Pr = 7.351 µC/cm2. Ferroelectric properties of the (Eu, Ni) co-doped samples were significantly enhanced. The BFO material exhibited a weak ferromagnetic behavior with saturation magnetization of Ms = 0.036 emu/g, remnant magnetization of Mr = 0.004 emu/g. The ferromagnetic properties of sample were also improved with presence of (Eu, Ni) dopants. The origin of the improvement in ferromagnetism, ferroelectricity, and fluorescence were also thoroughly discussed.

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“…So, the Eu-doped BiFeO3 samples with larger Eu ion concentrations, the rotation of BO6 octahedron is significant leading to significant reduction of both the crystal lattice parameters of a and c. This is maybe the reason why the average crystal size LXRD decreased , as shown in Table 1. The report of Park et al [14] and Surdu et al [15] also indicated that the crystal lattice parameters changed due to the difference in ionic radius of rare-earth ions and Bi 3+ ions. Raman scattering spectra of BFO and Eu-doped BiFeO3 are shown in Figure 2.…”

Section: Resultsmentioning

confidence: 94%

Effect of Eu Doping on Structural, Optical and Magnetic Properties of BiFeO3 Materials

Thang

Hùng²,

Thảo³

et al. 2022

MaP

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Bi1-xEuxFeO3 (BEFO) (x = 0.00 ÷ 0.10) materials were prepared by sol-gel method. The crystal structural, Raman scattering, magnetic and optical properties of BEFO were investigated by X-ray diffraction (XRD), Raman scattering spectroscopy, magnetic hysteresis (M-H) loops and fluorescence spectroscopy (FL), respectively. Obtained results of the characterization showed that Eu-doping affected structural, optical and magnetic properties of BFO materials. All samples were crystallized in the rhombohedral structure with R3C space group with crystal lattice parameters of a = 5.585 Å, c = 13.832 Å and the average crystal size of LXRD = 581 Å for BFO materials whereas the a, c and LXRD of Eu-doped samples decrease with the increasing of Eu3+ concentration. The analysis result of Raman scattering spectroscopy showed that the position of the characteristic peak for Bi-O covalent bonds shifts toward higher frequency when Eu3+ concentration increases, confirming the dopping substitution of Eu3+ ions into Bi-sites. Fluorescence spectra showed the enhancement of characteristic emission peaks with the increase of Eu concentration. All samples exhibited weak ferromagnetic behaviour with saturation magnetization of Ms = 0.006 emu/g and remnant magnetization of Mr = 0.004 emu/g for BFO materials. The value of Ms and Mr of Eu-doped BFO increases compared to those of undoped-BFO. The origin of ferromagnetism and fluorescence improvement has been discussed.

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Bi1−xEuxFeO3 Powders: Synthesis, Characterization, Magnetic and Photoluminescence Properties

Cited by 13 publications

References 53 publications

Magnetic Diagram of the High-Pressure Stabilized Multiferroic Perovskites of the BiFe1-yScyO3 Series

Magnetic Diagram of the High-Pressure Stabilized Multiferroic Perovskites of the BiFe1-yScyO3 Series

Microstructure and Physical Properties of (Eu, Ni) Co-Doped BiFeO₃ Materials

Effect of Eu Doping on Structural, Optical and Magnetic Properties of BiFeO3 Materials

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Bi1−xEuxFeO3 Powders: Synthesis, Characterization, Magnetic and Photoluminescence Properties

Cited by 13 publications

References 53 publications

Magnetic Diagram of the High-Pressure Stabilized Multiferroic Perovskites of the BiFe1-yScyO3 Series

Magnetic Diagram of the High-Pressure Stabilized Multiferroic Perovskites of the BiFe1-yScyO3 Series

Microstructure and Physical Properties of (Eu, Ni) Co-Doped BiFeO3 Materials

Effect of Eu Doping on Structural, Optical and Magnetic Properties of BiFeO3 Materials

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Product

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Microstructure and Physical Properties of (Eu, Ni) Co-Doped BiFeO₃ Materials