Impact of the R and Mg on the structural, hydrogenation and magnetic properties of R3-Mg Co9 (R = Pr, Nd, Tb and Y) compounds

Shtender, Vitalii; Paul‐Boncour, V.; Denys, R.V.; Hedlund, Daniel; Svedlindh, Peter; Zavaliy, I.Yu.

doi:10.1016/j.materresbull.2022.111981

Cited by 3 publications

(2 citation statements)

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“…To explain the values of magnetic moments measured by NPD, a comparison can be made with previous work on R 3– x Mg x Co 9 compounds. 24 It was found that the Tb 2 MgCo 9 compound is ferrimagnetic with antiparallel and colinear alignment of Tb and Co moments. For the latter compound, the mean value for the Co moment is 1.67 μ B /Co, and Tb is assumed to be 9.5 μ B /Tb.…”

Section: Resultsmentioning

confidence: 99%

TbMgNi_4–xCo_x–(H,D)₂ System. II: Correlation between Structural and Magnetic Properties

et al. 2023

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The magnetic properties of TbMgNi 4−x Co x intermetallic compounds and selected hydrides and deuterides of this system have been studied by various techniques, including magnetic measurements, in situ X-ray and neutron powder diffraction. The intermetallic compounds crystallize in a SnMgCu 4 -type structure and magnetically order below a Curie temperature (T C ), which increases exponentially with the Co content. This can be due to the ordering of the Co sublattice. On the other hand, the insertion of D or H in TbMgNiCo 3 strongly decreases T C . The X-ray diffraction measurements versus temperature reveal cell volume minima at T C for the compounds with x = 1−3 without any hints of the structure change. The analysis of the neutron diffraction patterns for the intermetallics with x = 2 and 3 indicates a slightly canted ferrimagnetic structure below T C . The Tb moments refined at 16 K are 4.1(2) μ B /Tb for x = 2, and 6.2(1) μ B /Tb for x = 3, which are smaller than the free ion value (9.5 μ B /Tb). This reduction can be due to the influence of temperature but also reveals the crystal field effect. As Ni and Co occupy statistically the same Wyckoff site, an average Ni/Co moment was refined, leading to 1.7(2) μ B /atom for x = 2 and 1.8(1) μ B /atom for x = 3 at 16 K. This moment is slightly canted compared to the Tb moment.

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Section: Resultsmentioning

confidence: 99%

TbMgNi_4–xCo_x–(H,D)₂ System. II: Correlation between Structural and Magnetic Properties

et al. 2023

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“…Among the different alloy systems, R-Mg-Ni-based hydrogen storage alloys have become a research focus because of the advantages of their high discharge capacity and good activation properties. It has also been shown that partial replacement of the rare-earth metal by magnesium has a positive impact on the discharge capacity for this type of alloy [5][6][7][8][9]. La 3-x Mg x Ni 9 (x = 1; 1.1; 1.2) alloys showed maximum discharge capacities in the range of up to 370-399 mA h/g (at 100 mA/g current density), depending on the Mg content, losing up to 45% of the capacity after 200 charge/discharge cycles [10].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical hydrogenation properties of Nd2MgT9 (T = 3d-metals) multi-phase alloys

VERBOVYTSKYY,

OPRYSK,

DUBOV

et al. 2022

Chem. Met. Alloys

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A series of alloys based on the intermetallic compounds Nd 2 MgNi 9 and Nd 2 MgCo 9 with the compositions Nd 2 MgT 8 T' (T = Ni, Co, T' = Fe, Co, Ni, Cu) and Nd 2 MgNi 9-x Co x (x = 0, 3, 4.5, 6, 9) were synthesized and their electrochemical hydrogenation properties studied. The alloys contained three phases: pseudo-binary AB 2 Laves (SnMgCu 4 structure type), AB 3 (PuNi 3 structure type), and AB 5 (CaCu 5 structure type) phases. Electrochemical characteristics such as discharge capacity and capacity retention were studied. The highest capacity (297 mA h/g) was achieved by the Nd 2 MgNi 9-x Co x (x = 6) alloy and may be related to the chemical and multi-phase composition. X-ray powder diffraction / AB 3 alloys / Transition metals / Electrochemical hydrogenation

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Effects of Mn and Fe elements on the electrochemical hydrogen storage properties of the A5B19-type La-Y-Mg-Ni-Al alloy for nickel metal hydride battery

Zhang,

Li,

et al. 2024

Journal of Alloys and Compounds

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Impact of the R and Mg on the structural, hydrogenation and magnetic properties of R3-Mg Co9 (R = Pr, Nd, Tb and Y) compounds

Cited by 3 publications

References 25 publications

TbMgNi_4–xCo_x–(H,D)₂ System. II: Correlation between Structural and Magnetic Properties

TbMgNi_4–xCo_x–(H,D)₂ System. II: Correlation between Structural and Magnetic Properties

Electrochemical hydrogenation properties of Nd2MgT9 (T = 3d-metals) multi-phase alloys

Effects of Mn and Fe elements on the electrochemical hydrogen storage properties of the A5B19-type La-Y-Mg-Ni-Al alloy for nickel metal hydride battery

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Impact of the R and Mg on the structural, hydrogenation and magnetic properties of R3-Mg Co9 (R = Pr, Nd, Tb and Y) compounds

Cited by 3 publications

References 25 publications

TbMgNi4–xCox–(H,D)2 System. II: Correlation between Structural and Magnetic Properties

TbMgNi4–xCox–(H,D)2 System. II: Correlation between Structural and Magnetic Properties

Electrochemical hydrogenation properties of Nd2MgT9 (T = 3d-metals) multi-phase alloys

Effects of Mn and Fe elements on the electrochemical hydrogen storage properties of the A5B19-type La-Y-Mg-Ni-Al alloy for nickel metal hydride battery

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TbMgNi_4–xCo_x–(H,D)₂ System. II: Correlation between Structural and Magnetic Properties

TbMgNi_4–xCo_x–(H,D)₂ System. II: Correlation between Structural and Magnetic Properties