Magnetic properties of new CeTMg compounds (T  Ni, Pd)

Geibel, C.; Klinger, U.; Weiden, M.; Buschinger, B.; Steglich, F.

doi:10.1016/s0921-4526(97)00098-7

Cited by 45 publications

(30 citation statements)

References 5 publications

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“…The room temperature susceptibility amounts to 7 Â 10 À4 emu mol À1 . This is in line with the previously reported data by Geibel et al [5] as well as the magnetic properties of CeNi 4 Mg samples prepared by ball milling [38].…”

Section: Atomsupporting

confidence: 93%

Structure, homogeneity ranges, magnetic, and electrical properties of the ordered Laves phases RENi4Mg with MgCu4Sn type structure

et al. 2011

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Section: Atomsupporting

confidence: 93%

Structure, homogeneity ranges, magnetic, and electrical properties of the ordered Laves phases RENi4Mg with MgCu4Sn type structure

et al. 2011

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“…Further interest in the La--Mg--Ni--H system was recently raised by our discovery of hydrogen induced metal-insulator (M-I) transitions for compositions such as LaMg 2 Ni--H [6] and La 2 MgNi 2 --H [7]. In view of this work, we decided to investigate a system having the composition LaMgNi 4 --H. The intermetallic compound LaMgNi 4 is known [8,9] to crystallize with the cubic MgCu 4 Sn type structure, an ordered derivative of the well known cubic Laves phase (C15) type structure. In a previous study [10] we have reported ex-situ structure and pressure-composition isotherm (PCI) data for the analogous neodymium system NdMgNi 4 --H which contains a hydride phase that is stable at room temperature but looses hydrogen rapidly in air.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen induced site depopulation in the LaMgNi₄-hydrogen system

Chotard¹,

Sheptyakov²,

Yvon³

2008

Zeitschrift Für Kristallographie

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Metal hydride structures / In-situ neutron powder diffraction / Pressure-composition-isotherms / Structure-property relation Abstract. The LaMgNi 4 -hydrogen system was investigated by in-situ neutron powder diffraction and pressurecomposition isotherm measurements at 100 C and hydrogen (deuterium) pressures of up 50 bar. The system displays three hydride phases that have distinctly different hydrogen plateau pressures and H atom distributions. The cubic a-LaMgNi 4 H 0:75 phase forms below 0.01 bar hydrogen pressure and H atoms fill one type of tetrahedral Ni 4 interstices. The orthorhombic distorted b-LaMgNiH 3:7 phase forms at $3 bar hydrogen pressure and H atoms fill both tetrahedral LaNi 3 and triangular bi-pyramidal La 2 MgNi 2 interstices. Interestingly, tetrahedral Ni 4 interstices are no longer occupied. Finally, the most hydrogen rich gLaMgNi 4 H 4:85 phase forms above 20 bar. It has again cubic symmetry and H atoms continue to occupy triangular bipyramidal La 2 MgNi 2 interstices while filling a new type of tetrahedral Ni 4 interstices that are neither occupied in the a-nor in the b-phase. The tetrahedral LaNi 3 interstices occupied in the b-phase are empty. Hydrogen induced depopulations of interstitial sites in metal hydrides are relatively rare and consistent with, but not entirely due to, the onset of repulsive H--H interactions at increasing hydrogen concentrations.

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“…LaAgMg, YbAgMg [10], YbAuMg, YbAuCd [6], and YbAgCd [9] are Pauli paramagnets. CePdMg [3] and CeAgMg [10] contain stable trivalent cerium. No magnetic ordering is evident down to 2 K. The europium and gadolinium compounds studied so far show ferromagnetic ordering at relatively high Curie temperatures, i. e. 28 K for EuAgMg [10], EuAgCd [9], and EuAuCd [6], 36 K for EuAuMg [10] and even 62.5 K for GdPdCd [8].…”

Section: Abstract: Intermetallic Compounds Crystal Structure; Magnesiummentioning

confidence: 99%