Maskova-Cerna, S., Bauer, E., Giovannini, M., & Havela, L. (2023). Heavy-Fermion Properties of Yb₂Pd₂SnH≈₂. Inorganics, 11(10), Article 414. https://doi.org/10.3390/inorganics11100414
E138-03 - Forschungsbereich Functional and Magnetic Materials
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Journal:
Inorganics
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ISSN:
2304-6740
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Date (published):
Oct-2023
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Number of Pages:
12
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Publisher:
MDPI
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Peer reviewed:
Yes
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Keywords:
hydrogen absorption; intermetallic compounds; magnetic properties
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Abstract:
A hydride of Yb₂Pd₂Sn could be synthesized with approximately 2 H atoms per f.u. The hydrogenation leads to a volume expansion while preserving the tetragonal symmetry (P4/mbm). The lattice reaction is strongly anisotropic, and the 5% expansion in c is partly compensated by the 0.5% compression in a. The hydride is paramagnetic at least down to 0.5 K. Yb remains at or very close to the 3+ (4f¹³) state, as in Yb₂Pd₂Sn. Specific heat C/T vs. T shows an upturn existing already in Yb₂Pd₂Sn, but it is much more pronounced in the hydride (1.8 J/mol f.u. K² for T → 0, i.e., more than twice higher than in its precursor). This is interpreted as lowering the Kondo temperature due to H bonding.
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Project (external):
Czech Research Infrastructures
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Project ID:
LM2018096
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Research Areas:
Metallic Materials: 20% Materials Characterization: 50% Climate Neutral, Renewable and Conventional Energy Supply Systems: 30%