Hyperfine interaction, Raman and magnetic study of YFeO3 nanocrystals

Nagrare, Bhagyashree S.; Kekade, Shankar S.; Thombare, Balu R.; Reddy, Raghavendra V.; Patil, S. F.

doi:10.1016/j.ssc.2018.06.004

Cited by 33 publications

(11 citation statements)

References 34 publications

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“…A saturation polarization loop at room temperature in YFO nanoparticles is observed experimentally in Ref. [7]. It must be noted that the polarization decreases with decreasing nanoparticle size N (not shown here).…”

Section: Electric Field Dependence Of the Polarizationsupporting

confidence: 63%

“…is observed the phonon energy ω and phonon damping γ γ = γ sp−ph + γ ph−ph (7) using the full Hamiltonian and the method of Tserkovnikov [31].…”

Section: Model and Methodsmentioning

confidence: 99%

“…YFO is an antiferromagnet with a super-exchange magnetic interaction between two Fe 3+ ions, the arrangement of which is not perfectly antiparallel, leading to a weak ferromagnetism with a Neel temperature of T N ∼640 K [1,2]. Moreover, a saturation polarization at room temperature is observed [2,[5][6][7], which is an evidence for the multiferroism of YFO. YFO is a type II multiferroic.…”

Section: Introductionmentioning

confidence: 97%

“…YFO is a type II multiferroic. The microscopic origin of the ferroelectric polarization is considered a spinexchange striction [7]. The Raman spectra of YFO have been investigated by Raut et al [8], Saha et al [9] and Coutinho et al [10].…”

Section: Introductionmentioning

confidence: 99%

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Multiferroic, Phonon and Optical Properties of Pure and Ion-Doped YFeO3 Nanoparticles

2021

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The magnetic, electric, phonon and optical properties of pure and ion-doped orthorhombic YFeO3 nanoparticles are studied for the first time theoretically. The spontaneous magnetization Ms in YFeO3 decreases with decreasing particle size. Ms is also shape dependent. The magnetization increases by Co and Er ion doping and decreases by Ti doping, which is caused by the different strain which appears in the nanoparticles and changes the exchange interaction constants in the doped states. The phonon energy for the Ag mode ω = 149 cm−1 and their damping decreases or increases with increasing temperature, respectively. Both show a kink near the Neel temperature, TN, which disappears by applying an external magnetic field. The influence of different ion doping on the band gap energy is also discussed. The doping effects can be used for different applications.

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Section: Electric Field Dependence Of the Polarizationsupporting

confidence: 63%

“…is observed the phonon energy ω and phonon damping γ γ = γ sp−ph + γ ph−ph (7) using the full Hamiltonian and the method of Tserkovnikov [31].…”

Section: Model and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Multiferroic, Phonon and Optical Properties of Pure and Ion-Doped YFeO3 Nanoparticles

2021

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“…We carefully checked possible side phases such as several Fe oxides and Y2O3, since phase transformation can occur for LPP of oxide colloids [55], but none of those fits with their largest diffraction peaks to the two broad features (red stars). Another Y-Fe oxide, namely the yttrium iron perovskite phase YFeO3 (YIP), exhibits several diffraction peaks in the respective range, as reported by Nagrare et al for YFeO3 nanocrystals [56]. Considering the small crystallite size of about 5 nm, several closely located XRD peaks will overlap and merge.…”

Section: Structural Analysismentioning

confidence: 78%

Manipulation of the Size and Phase Composition of Yttrium Iron Garnet Nanoparticles by Pulsed Laser Post-Processing in Liquid

et al. 2020

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Modification of the size and phase composition of magnetic oxide nanomaterials dispersed in liquids by laser synthesis and processing of colloids has high implications for applications in biomedicine, catalysis and for nanoparticle-polymer composites. Controlling these properties for ternary oxides, however, is challenging with typical additives like salts and ligands and can lead to unwanted byproducts and various phases. In our study, we demonstrate how additive-free pulsed laser post-processing (LPP) of colloidal yttrium iron oxide nanoparticles using high repetition rates and power at 355 nm laser wavelength can be used for phase transformation and phase purification of the garnet structure by variation of the laser fluence as well as the applied energy dose. Furthermore, LPP allows particle size modification between 5 nm (ps laser) and 20 nm (ns laser) and significant increase of the monodispersity. Resulting colloidal nanoparticles are investigated regarding their size, structure and temperature-dependent magnetic properties.

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Grain Size‐Dependent Structural, Optical, Dielectric, and Magnetic Properties of YFeO₃ Nanomaterials Obtained by the Sol–Gel Technique Using Tartaric Acid as a Chelating Agent

Venkatrao

Reddy

Kandula

et al. 2022

Physica Status Solidi (b)

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This article reports the structural, optical, dielectric, and magnetic properties of yttrium orthoferrite (YFeO3) nanomaterials with different crystallite sizes derived from the sol–gel technique using tartaric acid as a complex agent. Different crystallite sizes (ranging from 0.4 to 2.11 μm) of YFeO3 (YFO) are fabricated by altering the sintering temperatures (in the range of 1173–1623 K) for the same duration (5 h). Rietveld refinements suggest that the different crystallite sizes of YFO exhibit a pure orthorhombic perovskite structure with the Pmna space group. It is observed that the grain size of the material increased with increasing sintering temperature. The highest magnetization value (5.078 emu g−1) is observed for the 0.89 μm size of YFO. A decrease in the optical bandgap of YFO material is observed with an increase in crystallite size. In conclusion, the optimized crystallite size is 0.89 μm for achieving the highest magnetization value of the YFO material synthesized by the sol–gel technique using tartaric acid as a chelating agent.

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Hyperfine interaction, Raman and magnetic study of YFeO3 nanocrystals

Cited by 33 publications

References 34 publications

Multiferroic, Phonon and Optical Properties of Pure and Ion-Doped YFeO3 Nanoparticles

Multiferroic, Phonon and Optical Properties of Pure and Ion-Doped YFeO3 Nanoparticles

Manipulation of the Size and Phase Composition of Yttrium Iron Garnet Nanoparticles by Pulsed Laser Post-Processing in Liquid

Grain Size‐Dependent Structural, Optical, Dielectric, and Magnetic Properties of YFeO₃ Nanomaterials Obtained by the Sol–Gel Technique Using Tartaric Acid as a Chelating Agent

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Hyperfine interaction, Raman and magnetic study of YFeO3 nanocrystals

Cited by 33 publications

References 34 publications

Multiferroic, Phonon and Optical Properties of Pure and Ion-Doped YFeO3 Nanoparticles

Multiferroic, Phonon and Optical Properties of Pure and Ion-Doped YFeO3 Nanoparticles

Manipulation of the Size and Phase Composition of Yttrium Iron Garnet Nanoparticles by Pulsed Laser Post-Processing in Liquid

Grain Size‐Dependent Structural, Optical, Dielectric, and Magnetic Properties of YFeO3 Nanomaterials Obtained by the Sol–Gel Technique Using Tartaric Acid as a Chelating Agent

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Grain Size‐Dependent Structural, Optical, Dielectric, and Magnetic Properties of YFeO₃ Nanomaterials Obtained by the Sol–Gel Technique Using Tartaric Acid as a Chelating Agent