Synergistic effect of trivalent (Gd3+, Sm3+) and high-valent (Ti4+) co-doping on antiferromagnetic YFeO3

Bharadwaj, P.S.J.; Kundu, Sudipta; Sai, K. Vijay; Varma, K. B. R.

doi:10.1039/d0ra02532a

Cited by 33 publications

(14 citation statements)

References 35 publications

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“…Because Y 3 + and Fe 3+ cations are isovalent in YFO, for example, Fe Y and/or Y Fe antisites could form without changes in stoichiometry. As determined with density functional theory, Fe Y antisites in a thin film have a significantly higher formation energy than Y Fe due to the atomic size mismatch ( r Y = 106 pm and r Fe = 65 pm [ 17 ] ). [ 3 ] The bonding environment for atoms at planar defects, however, is considerably different than the ‘pristine’ crystal and thus other types of point defects may be present in thin film YFO.…”

Section: Introductionmentioning

confidence: 99%

Antisite Defects Stabilized by Antiphase Boundaries in YFeO₃ Thin Films

Kumar

Klyukin

Ning

et al. 2021

Adv Funct Materials

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YFeO3 thin films are a recent addition to the family of multiferroic orthoferrites where YFe antisite defects and strain have been shown to introduce polar displacements while retaining magnetic properties. Complete control of the multiferroic properties, however, necessitates knowledge of the defects present and their potential role in modifying behavior. Here, the structure and chemistry of antiphase boundaries in Y‐rich multiferroic YFeO3 thin films are reported using aberration corrected scanning transmission electron microscopy combined with atomic resolution energy dispersive X‐ray spectroscopy. It is found that FeY antisites, which are not stable in the Y‐rich film bulk, periodically arrange along antiphase boundaries due to changes in the local structural environment. Using density functional theory, it is shown that the antiphase boundaries are polar and bi‐stable, where the presence of FeY antisites significantly decreases the switching barrier. These results highlight how planar defects, such as antiphase boundaries, can stabilize point defects that would otherwise not be expected to form within the structure.

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Section: Introductionmentioning

confidence: 99%

Antisite Defects Stabilized by Antiphase Boundaries in YFeO₃ Thin Films

Kumar

Klyukin

Ning

et al. 2021

Adv Funct Materials

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“…The peaks below 200 cm -1 are assigned to the displacements of heavy rare-earth ions in the structure. The peaks appear at 269 cm -1 , 348 cm -1 , 443 cm -1 , and 509 cm -1 are associated to the excitation of magnetic Fe 3+ ions [32]. The peak observed at 646 cm -1 might be linked to impurity scattering [33] or second order Raman scattering [34].…”

Section: Sem and Xps Analysismentioning

confidence: 94%

Electrical and optical characterization of Os-substituted rare-earth orthoferrite YbFeO3-γ powders

et al. 2021

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The electrical properties of Os doped YbFeO3 (YbFO) powders prepared by solid-state reaction have been studied by Novocontrol Dielectric/Impedance Spectrometer. SEM, XPS and Raman spectroscopy were utilized for understanding chemical and structured analysis of the synthesized compounds. SEM images have revealed the void nature of the pellets. Furthermore, XPS studies have exhibited that Yb has 3+ valance state. It is also revealed that the oxygen vacancies concentration drops as the Os doping level raises by XPS analysis. The frequency dependency of loss-tan(δ) examination has demonstrated that the 5 mol % Os substituted sample has the lowest loss-tan(δ) values at high frequency regions at 100 0 C. It has been also realized that the 5 mol % Os doped compound exhibits the highest resistivity among the samples. Raman spectroscopy examination has unveiled that the samples have similar space group. In addition, the optical band gap of the synthesized powders was also extracted via utilizing the Kubelka-Munk technique. It was realized that the band gap of YbFO slightly increases as the Os dopant ratio advances.

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“…Substitution, the co-substitution of different valance (di, tri, and tetra) atoms and nanocomposite of YFO materials was well studied concerning their structural and physical properties such as optical, dielectric, and magnetic properties. [10][11][12][13][14][15] Even though YFO was well characterized, nevertheless no reports available in the literature related to its size-dependent structural, optical, dielectric, and magnetic properties, especially using tartaric acid as a chelating agent in the sol-gel technique. It is imperative to know the grain size-dependent functionalities of YFO ceramics to obtain the best performance using suitable microstructure for fabricating miniaturized devices to meet the present development of technology.…”

Section: Introductionmentioning

confidence: 99%

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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Synergistic effect of trivalent (Gd³⁺, Sm³⁺) and high-valent (Ti⁴⁺) co-doping on antiferromagnetic YFeO₃

Abstract: The work investigates the impact of doping (Sm3+, Gd3+ at Y3+ site and Ti4+ at Fe3+ site respectively) on structural, optical and magnetic properties of YFeO3.

Cited by 33 publications

References 35 publications

Antisite Defects Stabilized by Antiphase Boundaries in YFeO₃ Thin Films

Antisite Defects Stabilized by Antiphase Boundaries in YFeO₃ Thin Films

Electrical and optical characterization of Os-substituted rare-earth orthoferrite YbFeO3-γ powders

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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Synergistic effect of trivalent (Gd3+, Sm3+) and high-valent (Ti4+) co-doping on antiferromagnetic YFeO3

Abstract: The work investigates the impact of doping (Sm3+, Gd3+ at Y3+ site and Ti4+ at Fe3+ site respectively) on structural, optical and magnetic properties of YFeO3.

Cited by 33 publications

References 35 publications

Antisite Defects Stabilized by Antiphase Boundaries in YFeO3 Thin Films

Antisite Defects Stabilized by Antiphase Boundaries in YFeO3 Thin Films

Electrical and optical characterization of Os-substituted rare-earth orthoferrite YbFeO3-γ powders

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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Synergistic effect of trivalent (Gd³⁺, Sm³⁺) and high-valent (Ti⁴⁺) co-doping on antiferromagnetic YFeO₃

Antisite Defects Stabilized by Antiphase Boundaries in YFeO₃ Thin Films

Antisite Defects Stabilized by Antiphase Boundaries in YFeO₃ Thin Films

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