Magnetic nanosized rare earth iron garnets R3Fe5O12: Sol–gel fabrication, characterization and reinspection

Opuchovič, Olga; Kareiva, Aivaras; Mažeika, Kęstutis; Baltrūnas, D.

doi:10.1016/j.jmmm.2016.09.041

Cited by 50 publications

(13 citation statements)

References 37 publications

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“…The refined values of the hyperfine parameters are consistent with high‐spin iron(III) ions located at a crystallographic site in octahedral symmetry (site 1) in good agreement with the perovskite structure of these compounds. The isomer shift ( δ ) values determined for the EuFeO 3 and TbFeO 3 samples are very close to those reported in previous studies for similar compounds , , , . The values of the hyperfine field are around 50 T, indicating that the hyperfine field is very close to the saturated field.…”

Section: Resultssupporting

confidence: 87%

“…Mössbauer room temperature experimental spectra of LnFeO 3 are illustrated in Figure with their calculated spectra, while the hyperfine parameters are gathered in Table . For the three compounds, the major contribution is described by the presence of a magnetically ordered sextet . The refined values of the hyperfine parameters are consistent with high‐spin iron(III) ions located at a crystallographic site in octahedral symmetry (site 1) in good agreement with the perovskite structure of these compounds.…”

Section: Resultssupporting

confidence: 62%

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Synthesis and Characterization of Rare‐Earth Orthoferrite LnFeO₃ Nanoparticles for Bioimaging

et al. 2018

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A combination of sol-gel synthesis and thermal decomposition was developed for preparing nanosized, perovskite-type LnFeO 3 (Ln = Eu, Gd, Tb) powders. Perovskite-type powders with crystalline particles of 100 nm average size, as determined by transmission electron microscopy (TEM), could be obtained after a thermal treatment at 800°C. The perovskite nanoparticles (NPs) were further characterized by X-ray powder diffraction and Mössbauer spectroscopy. These were in agreement with the pure perovskite LnFeO 3 structure with the expected Zeeman sextet corresponding to a magnetically ordered [a]

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 62%

Synthesis and Characterization of Rare‐Earth Orthoferrite LnFeO₃ Nanoparticles for Bioimaging

et al. 2018

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“…Thus, additional energy is required in the form of a larger applied field to overcome the decrease in the energy of the wall and to release it from grain boundaries. This results in an increase in the values of H c for the multi-domain structure, where the regions of uniform magnetization are separated by domain walls [3]. …”

Section: Resultsmentioning

confidence: 99%

“…Yttrium iron garnet, Y 3 Fe 5 O 12 (YIG) that contain only trivalent ions, has been receiving attention for a long time due to its remarkable properties, such as high electrical resistivity ( ρ = 10 8 Ωm), low dielectric losses (tan δ = 1 × 10 −4 ), high relative permittivity (ε r = 20–100), medium saturation magnetization ( M s = 26 emu/g), and low coercivity ( H c = 17 Oe) [1,2,3,4]. …”

Section: Introductionmentioning

confidence: 99%

Enhancement in Curie Temperature of Yttrium Iron Garnet by Doping with Neodymium

et al. 2018

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The effect of the substitution of Y3+ by Nd3+ on the structural and magnetic properties of neodymium-doped yttrium iron garnet, NdxY3−xFe5O12 with x in the range of 0–2.5, is presented. Oxide powders of Fe2O3, Nd2O3, and Y2O3 were mixed in a stoichiometric ratio and milled for 5 h using high-energy ball milling, before being uniaxially pressed at 900 MPa and annealed at 1373 K for 2 h to obtain NdxY3−xFe5O12 (0 ≤ x ≤ 2.5). It was found that the mechanical milling of oxides followed by annealing promotes the complete structural formation of the garnet structure. Additionally, the X-ray diffraction patterns confirm the complete introduction of Nd3+ into the garnet structure with a neodymium doping concentration (x) of 0–2.0, which causes a consistent increment in the lattice parameters with the Nd3+ content. When x is higher than 2.0, the yttrium orthoferrite is the predominant phase. Besides, the magnetic results reveal an increase in the Curie temperature (583 K) as the amount of Nd3+ increases, while there was enhanced saturation magnetization as well as modified remanence and coercivity with respect to non-doped YIG.

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“…Основными факторами, влияющими на параметры и свойства R 3 Fe 5 O 12 и соответственно области их практического применения, являются микроструктура и состав. Исследованию именно этих параметров посвящено обширное количество работ различных научных коллективов [20][21][22][23][24].…”

Section: Introductionunclassified

Микроструктура и элементный состав наноразмерных порошков и пленок редкоземельных ферритов-гранатов на основе Sm-=SUB=-3-=/SUB=-Fe-=SUB=-5-=/SUB=-O-=SUB=-12-=/SUB=-

Цидаева¹,

Накусов²,

Хайманов³

et al. 2020

Журнал Технической Физики

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The synthesis of nanostructured powders and films based on rare-earth ferrite garnet Sm3Fe5O12 was carried out with hydrothermal as well as with the method of precipitation of aqueous solutions of nitrates on the substrate surface. Using atomic force microscopy (AFM), scanning electron microscopy (SEM), Raman spectroscopy (Raman), and X-ray phase analysis (XRD), the topology of the surface and the phase composition of the samples were studied. According to AFM and SEM, particle sizes were evaluated and the structural features of powders and films were analyzed. Raman spectroscopy (RS) and X-ray phase analysis were used to examine the chemical composition and crystal structures of synthesized samples. The possibility of simultaneous investigation of the same sample area with AFM methods and Raman spectroscopy made it possible to obtain data of the chemical composition, the presence of impurities and defects, and the shape of macromolecules. Taking into account the set of obtained results, it is shown that materials based on Sm3Fe5O12, due to their structural features and physics-chemical parameters, can be used as filters for industrial sewage treatment.

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Magnetic nanosized rare earth iron garnets R3Fe5O12: Sol–gel fabrication, characterization and reinspection

Cited by 50 publications

References 37 publications

Synthesis and Characterization of Rare‐Earth Orthoferrite LnFeO₃ Nanoparticles for Bioimaging

Synthesis and Characterization of Rare‐Earth Orthoferrite LnFeO₃ Nanoparticles for Bioimaging

Enhancement in Curie Temperature of Yttrium Iron Garnet by Doping with Neodymium

Микроструктура и элементный состав наноразмерных порошков и пленок редкоземельных ферритов-гранатов на основе Sm-=SUB=-3-=/SUB=-Fe-=SUB=-5-=/SUB=-O-=SUB=-12-=/SUB=-

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Magnetic nanosized rare earth iron garnets R3Fe5O12: Sol–gel fabrication, characterization and reinspection

Cited by 50 publications

References 37 publications

Synthesis and Characterization of Rare‐Earth Orthoferrite LnFeO3 Nanoparticles for Bioimaging

Synthesis and Characterization of Rare‐Earth Orthoferrite LnFeO3 Nanoparticles for Bioimaging

Enhancement in Curie Temperature of Yttrium Iron Garnet by Doping with Neodymium

Микроструктура и элементный состав наноразмерных порошков и пленок редкоземельных ферритов-гранатов на основе Sm-=SUB=-3-=/SUB=-Fe-=SUB=-5-=/SUB=-O-=SUB=-12-=/SUB=-

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Synthesis and Characterization of Rare‐Earth Orthoferrite LnFeO₃ Nanoparticles for Bioimaging

Synthesis and Characterization of Rare‐Earth Orthoferrite LnFeO₃ Nanoparticles for Bioimaging