Bridgman crystal growth of Yb2Ru3Ge4—A ternary germanide with a three-dimensional network of condensed distorted RuGe5 and RuGe6 units

Schappacher, Falko M.; Katoh, K.; Pöttgen, Rainer

doi:10.1016/j.jssc.2006.10.008

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…The increase of the dimensionality from two-dimensional in UFe 2 Si 2 to three-dimensional in UFe 5 Si 3 is a direct consequence of lower uranium content. The 5f element can transfer less electron density toward the iron and silicon atoms, as a result the dimensionality of the [Fe × Si y ] network rise, as recently observed for the compound Yb 2 Ru 3 Ge 4 3 Perspective view of the crystal structure of UFe 5 Si 3 .…”

Section: Resultsmentioning

confidence: 73%

Novel Intermetallic Compound UFe₅Si₃: A New Room-Temperature Magnet with an Original Atomic Arrangement

et al. 2007

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The new compound UFe5Si3 was prepared by rapid solidification of the melt using a splat cooling technique, followed by annealing at 1173 K for 10 days. Its crystal structure was determined ab initio from powder X-ray diffraction data. It crystallizes in the tetragonal space group P4/mmm, with lattice parameters at room temperature of a = 3.9298(3) Å and c = 7.7133(6) Å. The structure of UFe5Si3, which is new among intermetallic compounds, can be viewed as built up from an infinite three-dimensional framework of Fe and Si atoms defining along the a direction, tunnels of hexagonal sections, where the U atoms lie. Alternating and direct current magnetic measurements reveal that UFe5Si3 behaves as a hard ferromagnet with a Curie temperature of about 310 K. Measurements on magnetically oriented powder suggest that UFe5Si3 has a uniaxial anisotropy with c as the easy axis. The electrical resistivity decreases monotonously with decreasing temperature suggesting no other magnetic transition below 300 K. In line with this metallic behavior the thermal variation of the thermoelectric power remains of the order of several μV/K. A maximum around 60 K with a value of 12 μV/K can be ascribed to Kondo interactions and/or crystalline electrical field effects.

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Section: Resultsmentioning

confidence: 73%

Novel Intermetallic Compound UFe₅Si₃: A New Room-Temperature Magnet with an Original Atomic Arrangement

et al. 2007

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“…Knowing that I 2/ a can be standardized into C 2/ c , four known, related compounds with a

{2:3:4}

stoichiometry were found to exist, namely Hf 2 Ru 3 Si 4 , Zr 2 Ru 3 Si 4 ,Yb 2 Ru 3 Ge 4 and Sc 2 Ru 3 Si 4 [24–26] . The crystal structure of those compounds corresponds to a site exchange variant of the Sc 3 Re 2 Si 4 structure [27] .…”

Section: Resultsmentioning

confidence: 99%

New Phases in the Sc−Mn−Si and Sc−Mn−Al−Si Systems Through Molten Indium Flux Synthesis

Lefèvre,

Eder,

von Rohr

2024

Helvetica Chimica Acta

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Through the application of synthesis via molten indium flux, we have been able to expand the ternary Sc−Mn−Si system and the quaternary Sc−Mn−Al−Si system. Specifically, we report on five previously unknown chemical compounds, namely β‐ScMnSi2, Sc4+xMn4Si7–2x, Sc2Mn4Si5, Sc2Mn3Si4, and Sc4Mn2AlSi4. The compounds with the stoichiometries Sc2Mn4Si5, Sc2Mn3Si4, and Sc4Mn2AlSi4 have previously not been reported. We find that these crystallize in the V6Si5, Hf2Ru3Si4, and Ho4Ni2InGe4 structure types, respectively. For the ternary compounds with the stoichiometries of ScMnSi2 and Sc4+xMn4Si7–2x, we find clearly deviating structural solutions compared to earlier reports. β‐ScMnSi2 is found to crystallize in the monoclinic crystal system isostructural to a supercell of the MnTiSi2 structure and clearly deviating from the known orthorhombic α‐polymorph. The compound Sc4+xMn4Si7–2x is structurally very similar to Sc4Mn4Si7, but exhibits the P4/nmm space group instead of I4/mmm, and is related to the Zr4Co4Ge7 structure. Disorder between Si and Sc sites leads to the off‐stoichiometric composition, for which we found x=0.287(5).

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“…Crystals for diffraction experiments were finally separated from different slices that were prepared from the bulk crystal via spark erosion. Further examples for the Bridgman crystal growth are the germanides Yb 2 Ru 3 Ge 4 , 41 YbPdGe, and YbPtGe. 42…”

Section: ■ Syntheses and Crystal Growthmentioning

confidence: 99%

On the Ytterbium Valence and the Physical Properties in Selected Intermetallic Phases

Engel,

Gießelmann,

Reimann

et al. 2024

ACS Org. Inorg. Au

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The present review summarizes important aspects of the crystal chemistry of ytterbium-based intermetallic compounds along with a selection of their outstanding physical properties. These originate in many cases from the ytterbium valence. Different valence states are possible here, divalent (4f 14 ), intermediate-valent, or trivalent (4f 13 ) ytterbium, resulting in simple diamagnetic, Pauli or Curie−Weiss paramagnetic, or valence fluctuating behavior. Especially, some of the Yb 3+ intermetallics have gained deep interest due to their Kondo or heavy Fermion ground states. We have summarized their property investigations using magnetic and transport measurements, specific heat data, NMR, ESR, and Mossbauer spectroscopy, elastic and inelastic neutron scattering, and XAS data as well as detailed thermoelectric measurements.

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Bridgman crystal growth of Yb2Ru3Ge4—A ternary germanide with a three-dimensional network of condensed distorted RuGe5 and RuGe6 units

Cited by 7 publications

References 16 publications

Novel Intermetallic Compound UFe₅Si₃: A New Room-Temperature Magnet with an Original Atomic Arrangement

Novel Intermetallic Compound UFe₅Si₃: A New Room-Temperature Magnet with an Original Atomic Arrangement

New Phases in the Sc−Mn−Si and Sc−Mn−Al−Si Systems Through Molten Indium Flux Synthesis

On the Ytterbium Valence and the Physical Properties in Selected Intermetallic Phases

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Bridgman crystal growth of Yb2Ru3Ge4—A ternary germanide with a three-dimensional network of condensed distorted RuGe5 and RuGe6 units

Cited by 7 publications

References 16 publications

Novel Intermetallic Compound UFe5Si3: A New Room-Temperature Magnet with an Original Atomic Arrangement

Novel Intermetallic Compound UFe5Si3: A New Room-Temperature Magnet with an Original Atomic Arrangement

New Phases in the Sc−Mn−Si and Sc−Mn−Al−Si Systems Through Molten Indium Flux Synthesis

On the Ytterbium Valence and the Physical Properties in Selected Intermetallic Phases

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Product

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Novel Intermetallic Compound UFe₅Si₃: A New Room-Temperature Magnet with an Original Atomic Arrangement

Novel Intermetallic Compound UFe₅Si₃: A New Room-Temperature Magnet with an Original Atomic Arrangement