Preparation and properties of boride phases of dysprosium

Dudnik, E. M.; Kocherzhinsky, Yu.A.; Paderno, Yu. B.; Shitsevalova, N.; Shishkin, E.A.; Kir'yakova, I. E.

doi:10.1016/0022-5088(79)90105-x

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Earlier, DyB 6 has been synthesized using spark plasma sintering, 37 floating zone growth, 38 and one report for solid-state synthesis in the presence of helium. 39 In the present work, BP has been synthesized hydrothermally; however, DyB 6 was synthesized by using borothermal reduction of DyOOH nanoparticles for the first time. The spin coating technique has been adopted for making field emitter films.…”

Section: Introductionmentioning

confidence: 98%

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Black Phosphorus/Dysprosium Hexaboride-Based Heterostructured Films for Field Emission Technologies

Yadav,

Sunaina,

Saini

et al. 2024

ACS Appl. Nano Mater.

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The demand for display devices increased very rapidly, and out of various display techniques, field emission-based display technology has huge potential to make nextgeneration display devices. A conventional field emitter uses single materials, which offer high quantum resistance between the emitter materials and substrate; thus, the heterostructure formation can be used for the reduction of quantum resistance by increasing the density of state near the Fermi level. Therefore, in the present work, black phosphorus (BP)/dysprosium hexaboride (DyB 6 ) heterostructures were used for field emission study. Here, BP was synthesized via a solvothermal route. The microstructural analysis of black phosphorus shows rod-like morphology of ∼1 μm length and ∼200 nm width. Apart from the BP, DyB 6 cubes of ∼100 nm were synthesized at 1000 °C in an argon atmosphere. The synthesized samples were used for making dispersion, and the as-prepared dispersion was used for the fabrication of films over a silicon substrate using a spin coating method. For the first time, field emission of BP/DyB 6 heterostructure films has been performed and hybrid structures show an enhanced enhancement factor (β = 2624) and a low turn-on field (3.74 V/μm). Mechanistic insights into the possible origin of enhanced.

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Section: Introductionmentioning

confidence: 98%

“…The high thermal and chemical stability in DyB 6 arises due to covalent bonds between the framework of B 6 (octahedral cage). Earlier, DyB 6 has been synthesized using spark plasma sintering, floating zone growth, and one report for solid-state synthesis in the presence of helium …”

Section: Introductionmentioning

confidence: 99%

Black Phosphorus/Dysprosium Hexaboride-Based Heterostructured Films for Field Emission Technologies

Yadav,

Sunaina,

Saini

et al. 2024

ACS Appl. Nano Mater.

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Enhanced higher temperature irreversibility field and critical current density in MgB₂ wires with Dy₂O₃ additions

Yang

Sumption

Rindfleisch

et al. 2021

Supercond. Sci. Technol.

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Bulk samples of magnesium diboride (MgB2) doped with 0.5 wt% of the rare earth oxides (REOs) Nd2O3 and Dy2O3 (named B-ND and B-DY) prepared by standard powder processing, and wires of MgB2 doped with 0.5 wt% Dy2O3 (named W-DY) prepared by a commercial powder-in-tube processing were studied. Investigations included x-ray diffractometry, scanning- and transmission electron microscopy, magnetic measurement of superconducting transition temperature (T c), magnetic and resistive measurements of upper critical field (B c2) and irreversibility field (B irr), as well as magnetic and transport measurements of critical current densities versus applied field (J cm(B) and J c(B), respectively). It was found that although the products of REO doping did not substitute into the MgB2 lattice, REO-based inclusions resided within grains and at grain boundaries. Curves of bulk pinning force density (F p) versus reduced field (b = B/B irr) showed that flux pinning was by predominantly by grain boundaries, not point defects. At all temperatures the F p(b) of W-DY experienced enhancement by inclusion-induced grain boundary refinement but at higher temperatures F p(b) was still further increased by a Dy2O3 additive-induced increase in B irr of about 1 T at all temperatures up to 20 K (and beyond). It is noted that Dy2O3 increases B irr and that it does so, not just at 4 K, but in the higher temperature regime. This important property, shared by a number of REOs and other oxides promises to extend the applications range of MgB2 conductors.

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Rare-earth–boron bonding and 4f state trends inRB4tetraborides

Yin¹,

Pickett²

2008

Phys. Rev. B

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The B-B bonding, boron-rare earth coupling, and the changes in 4f states across the lanthanide series in RB 4 ͑R = rare earth͒ compounds are studied using the correlated band theory LDA+ U method. A set of boron bonding bands that are well separated from the antibonding bands can be identified. Separately, the "dimer B" 2p z orbital is nonbonding ͑viz., graphite and MgB 2 ͒, but mixes strongly with the metal 4d or 5d states that form the conduction states. The bonding bands are not entirely filled even for the trivalent compounds ͑thus the cation d bands have some filling͒, which accounts for the lack of stability of this structure when the cations are divalent ͑with more bonding states unfilled͒. The trends in the mean 4f level for both majority and minority, and occupied and unoccupied, states are presented and interpreted.

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Preparation and properties of boride phases of dysprosium

Cited by 3 publications

References 2 publications

Black Phosphorus/Dysprosium Hexaboride-Based Heterostructured Films for Field Emission Technologies

Black Phosphorus/Dysprosium Hexaboride-Based Heterostructured Films for Field Emission Technologies

Enhanced higher temperature irreversibility field and critical current density in MgB₂ wires with Dy₂O₃ additions

Rare-earth–boron bonding and 4f state trends inRB4tetraborides

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Preparation and properties of boride phases of dysprosium

Cited by 3 publications

References 2 publications

Black Phosphorus/Dysprosium Hexaboride-Based Heterostructured Films for Field Emission Technologies

Black Phosphorus/Dysprosium Hexaboride-Based Heterostructured Films for Field Emission Technologies

Enhanced higher temperature irreversibility field and critical current density in MgB2 wires with Dy2O3 additions

Rare-earth–boron bonding and 4f state trends inRB4tetraborides

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Enhanced higher temperature irreversibility field and critical current density in MgB₂ wires with Dy₂O₃ additions