Magnetic properties and domain structure of FeB single crystals

Zhdanova, O. V.; Lyakhova, M. B.; Pastushenkov, Yu. G.

doi:10.1007/s11041-013-9581-0

Cited by 11 publications

(1 citation statement)

References 3 publications

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“…𝑒𝑓𝑓 of the paramagnetic phase has been determined by extracting the Curie constant from the linear regression of 𝜒 −1 (𝑇) and amounts to 1.50, 1.64 and 1.64 µB / Fe atom for Fe2Al1.15B2, Fe2Al1.1B2Ge0.05Ga0.05 and ARC1. The spontaneous magnetization 𝑚 𝑆 has been extracted at 10 K (see supplementary material S4) and is corrected for the ferromagnetic contribution of the secondary FeB phase, using the phase fraction determined by XRD and the literature 𝑚 𝑆 value of 77 Am 2 kg -1 for FeB73 . Fe2Al1.15B2, Fe2Al1.1B2Ge0.05Ga0.05, ARC1 and ARC2 show a spontaneous magnetization of 76.3, 81.8, 82.4 and 73.5 Am 2 kg -1 , i.e.…”

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Reactive single-step hot-pressing and magnetocaloric performance of polycrystalline Fe2Al1.15−xB2GexGax (x = 0, 0.05) MAB phases

Beckmann

El-Melegy

Koch

et al. 2023

Journal of Applied Physics

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Reactive single-step hot-pressing at 1473 K and 35 MPa for 4 h produces dense, bulk, near single-phase, low-cost, and low-criticality Fe2Al1.15B2 and Fe2Al1.1B2Ge0.05Ga0.05 MAB samples, showing second-order magnetic phase transition with favorable magnetocaloric properties around room temperature. The magnetic as well as the magnetocaloric properties can be tailored upon Ge and Ga doping, leading to an increase in the Curie temperature TC and the spontaneous magnetization mS. The maximum isothermal entropy change ΔsT,max of hot-pressed Fe2Al1.15B2 in magnetic field changes of 2 and 5 T amounts to 2.5 and 5 J(kgK)−1 at 287.5 K and increases by Ge and Ga addition to 3.1 and 6.2 J(kgK)−1 at 306.5 K, respectively. The directly measured maximum adiabatic temperature change ΔTad,max is improved by composition modification from 0.9 to 1.1 K in magnetic field changes of 1.93 T. Overall, we demonstrate that hot-pressing provides a much faster, more scalable, and processing costs reducing alternative compared to conventional synthesis routes to produce heat exchangers for magnetic cooling devices. Therefore, our criticality assessment shows that hot-pressed Fe-based MAB phases provide a promising compromise of material and processing costs, criticality, and magnetocaloric performance, demonstrating the potential for low-cost and low-criticality magnetocaloric applications around room temperature.

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confidence: 99%

Reactive single-step hot-pressing and magnetocaloric performance of polycrystalline Fe2Al1.15−xB2GexGax (x = 0, 0.05) MAB phases

Beckmann

El-Melegy

Koch

et al. 2023

Journal of Applied Physics

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Ultrafine Iron Boride as a Highly Efficient Nanocatalyst Expedites Sulfur Redox Electrochemistry for High‐Performance Lithium‐Sulfur Batteries

Chen,

Li,

Wang

et al. 2024

Batteries & Supercaps

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Lithium‐sulfur (Li‐S) batteries have garnered significant interest as a strong contender for future energy storage, characterized by their remarkable energy density and cost‐effectiveness. However, the sluggish conversion kinetics of the polysulfide intermediates, compounded with their shuttling behaviors, pose considerable challenges in sulfur electrochemistry. Herein, we develop a novel iron monoboride (FeB) electrocatalyst for boosting sulfur reactions and enhancing Li‐S battery performance. The ultrafine powdery FeB affords abundant and fully exposed active interfaces for host‐guest interactions. Meanwhile, the intrinsic high conductivity of FeB, combined with its strong adsorption and catalytic activity to polysulfides, enables substantial inhibition of the shuttle effect and enhancement of conversion kinetics. As a result, sulfur electrodes equipped with the FeB nanocatalyst realize excellent cyclability with a minimal capacity fading of 0.04 % per cycle over 500 cycles, as well as favorable rate capability up to 7 C. Moreover, decent areal capacity and cycling stability can be also achieved under high‐loading (5.1 mg cm‐2) and limited‐electrolyte (7.0 mL g‐1) configurations. This study presents a facile approach and insightful perspective on nanostructured metal boride for highly efficient sulfur electrocatalysis, holding good promise for the advancement of high‐performance Li‐S batteries.

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Eisengruppe: Elemente der achten Nebengruppe

Sicius

2021

Handbuch Der Chemischen Elemente

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Magnetic properties and domain structure of FeB single crystals

Cited by 11 publications

References 3 publications

Reactive single-step hot-pressing and magnetocaloric performance of polycrystalline Fe2Al1.15−xB2GexGax (x = 0, 0.05) MAB phases

Reactive single-step hot-pressing and magnetocaloric performance of polycrystalline Fe2Al1.15−xB2GexGax (x = 0, 0.05) MAB phases

Ultrafine Iron Boride as a Highly Efficient Nanocatalyst Expedites Sulfur Redox Electrochemistry for High‐Performance Lithium‐Sulfur Batteries

Eisengruppe: Elemente der achten Nebengruppe

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