Structural and electrical properties of YMnO3 manganites: Influence of Cr ion doping

Saxena, Pallavi; Mishra, Ashutosh

doi:10.1016/j.jssc.2021.122364

Cited by 17 publications

(11 citation statements)

References 42 publications

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“…Rietveld refinement was performed for both samples and the results are presented in Table 1. The cell parameters match well with those of the h-YMnO3 synthesized by the conventional solid-state method [32]. One of the advantages of the molten salt method is shorter reaction times in comparison with a solid-state reaction.…”

Section: Resultssupporting

confidence: 63%

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Molten Salt Synthesis of Micro-Sized Hexagonally Shaped REMnO3 (RE = Y, Er, Tm, Yb)

et al. 2023

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Yttrium manganite (YMnO3) is a compound belonging to the hexagonal rare earth manganites family, which demonstrates multiferroic properties. This material can be prepared by several synthetic approaches, with the most common one being the solid-state synthesis. In this work, we show a possibility of preparing this material via molten salt synthesis using the NaCl-KCl mixture as the reaction medium and yttrium and manganese nitrates as the starting materials. We demonstrate that, by varying the reaction temperature and the nitrates-to-chlorides ratio, it is feasible to synthesize hexagonally shaped particles of microscopic dimensions. A similar synthesis procedure can be successfully applied for the preparation of other hexagonal manganites—ErMnO3, TmMnO3, and YbMnO3.

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Section: Resultssupporting

confidence: 63%

“…The sample obtained at 1100 • C (Figure 4b) showed agglomerated micro-sized particles without distinctive shapes. According to the previous studies [32,37,38], h-YMnO 3 prepared by conventional solid-state synthesis route at similar temperatures consisted of larger agglomerates and clusters without particular shapes.…”

Section: Resultsmentioning

confidence: 99%

Molten Salt Synthesis of Micro-Sized Hexagonally Shaped REMnO3 (RE = Y, Er, Tm, Yb)

et al. 2023

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“…The Goldschmidt tolerance factor (t) for ABO 3 is given by t = false( r normalA + r normalO false) 2 false( r normalB + r normalO where r A , r B , and r O represent the ionic radii of the A-cation, B-cation, and oxygen, respectively. The ionic radii of Y 3+ , Mn 3+ , Cr 3+ , and oxygen are 0.90, 0.64, 0.61, and 1.40 Å . The small changes in the tolerance factor after doping can be related to the evolution of the metastable orthorhombic phase.…”

Section: Resultsmentioning

confidence: 98%

“…The ionic radii of Y 3+ , Mn 3+ , Cr 3+ , and oxygen are 0.90, 0.64, 0.61, and 1.40 Å. 42 The small changes in the tolerance factor after doping can be related to the evolution of the metastable orthorhombic phase. Since the metastable orthorhombic phase has lower geometrical stability, a small increase in the tolerance factor can lead to stabilizing the orthorhombic phase.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Field-Enhanced Oxygen Evolution in YMn_1–xCr_xO₃ (x = 0, 0.05, and 0.1) Perovskite Oxides

et al. 2023

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The oxygen evolution reaction (OER) plays a key role in various energy applications, and perovskite oxides have received significant interest in recent years as potential catalysts for the OER. Furthermore, magnetic field-enhanced electrocatalysis has emerged recently as a promising way to boost catalytic efficiency in magnetic materials. In the present work, YMnCrO 3 perovskite oxide nanostructures were synthesized, and their magnetic properties are altered by Cr doping in YMn 1−x Cr x O 3 (x = 0, 0.05, and 0.1). The magnetic hysteresis loop confirms the enhanced ferromagnetic exchange interaction with increasing Cr doping concentration. The highest ferromagnetic signal is observed in YMn 1−x Cr x O 3 (x = 0.1). More interestingly, the OER activities are significantly improved after doping of Cr in YMnO 3 . The improved OER activity under an applied magnetic field is related to the increase in the ferromagnetic exchange interaction after Cr doping.

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“…MnO 5 bipyramids are formed by Mn 3+ ions, two apical oxygen atoms (O1 and O2), and three in-plane oxygen atoms (O3 and O4). MnO5 trigonal bipyramids tilt to the ab -plane, leading to the manganese ion displacing from the bipyramid center, which causes the Mn 3+ triangular network lattice to distort [ 10 , 11 ]. The antiferromagnetic ordering originates from the super-exchange interactions between Mn 3+ in the ab -plane.…”

Section: Introductionmentioning

confidence: 99%

Modulation of the Structural, Magnetic, and Dielectric Properties of YMnO3 by Cu Doping

Wan,

Hua,

Guo

2024

Materials

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The lower valence compensation of YMn1-xCuxO3 (x = 0.00, 0.05, and 0.10) is prepared by the solid-state reaction, and the effects of divalent cation Cu-doping on the construction and magnetic and dielectric attributes of multiferroic YMnO3 are systemically researched. Powder X-ray diffraction shows YMn1-xCuxO3 has a single-phase hexagonal construction with a P63cm space group as the parent YMnO3, and lattice parameters decrease systematically as Cu concentration increases. Using the scanning electric microscope, structure morphologies analysis shows that the mean grain size varies between 1.90 and 2.20 μm as Cu content increases. YMn1-xCuxO3 magnetization increases as Cu doping concentration increases, and the antiferromagnetic transition temperature declines from 71 K for x = 0.00 to 58 K for x = 0.10. The valence distributions of Mn ions conduce to the modified magnetic attributes. Due to Cu substitution, the dielectric loss and dielectric constant decline as frequency increases from 400 to 700 K, showing representative relaxation behaviors. Indeed, that is a thermally activated process. In addition, the peak of the dielectric loss complies with the Arrhenius law. The relaxation correlates to the dipole effect regarding carrier hopping between Mn3+ and Mn4+, and also correlates to oxygen vacancies generated by Mn2+.

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Structural and electrical properties of YMnO3 manganites: Influence of Cr ion doping

Cited by 17 publications

References 42 publications

Molten Salt Synthesis of Micro-Sized Hexagonally Shaped REMnO3 (RE = Y, Er, Tm, Yb)

Molten Salt Synthesis of Micro-Sized Hexagonally Shaped REMnO3 (RE = Y, Er, Tm, Yb)

Magnetic Field-Enhanced Oxygen Evolution in YMn_1–xCr_xO₃ (x = 0, 0.05, and 0.1) Perovskite Oxides

Modulation of the Structural, Magnetic, and Dielectric Properties of YMnO3 by Cu Doping

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Structural and electrical properties of YMnO3 manganites: Influence of Cr ion doping

Cited by 17 publications

References 42 publications

Molten Salt Synthesis of Micro-Sized Hexagonally Shaped REMnO3 (RE = Y, Er, Tm, Yb)

Molten Salt Synthesis of Micro-Sized Hexagonally Shaped REMnO3 (RE = Y, Er, Tm, Yb)

Magnetic Field-Enhanced Oxygen Evolution in YMn1–xCrxO3 (x = 0, 0.05, and 0.1) Perovskite Oxides

Modulation of the Structural, Magnetic, and Dielectric Properties of YMnO3 by Cu Doping

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Magnetic Field-Enhanced Oxygen Evolution in YMn_1–xCr_xO₃ (x = 0, 0.05, and 0.1) Perovskite Oxides