Crystal structure and physical properties of AmPd5Al2
J.-C. Griveau, K. Gofryk, D. Bou\"exi\`ere, E. Colineau, and J., Rebizant
TL;DR
This study characterizes the crystal structure and physical properties of AmPd5Al2, revealing its non-magnetic, metallic nature and structural similarity to related compounds, with detailed measurements confirming its electronic behavior.
Contribution
It provides the first detailed structural and physical property analysis of AmPd5Al2, highlighting its non-magnetic ground state and metallic behavior, expanding understanding of americium-based intermetallics.
Findings
AmPd5Al2 crystallizes in ZrNi2Al5-type structure.
Exhibits paramagnetic behavior with no magnetic ordering down to 2 K.
Displays metallic electrical and thermoelectrical properties.
Abstract
We report on the crystal structure, magnetic susceptibility, specific heat, electrical and thermoelectrical properties of AmPd5Al2, the americium counterpart of the unconventional superconductor NpPd5Al2. AmPd5Al2 crystallizes in the ZrNi2Al5-type of structure with lattice parameters: a = 4.1298 A and c = 14.7925 A. Magnetic measurements of AmPd5Al2 indicate a paramagnetic behavior with no hint of magnetic ordering nor superconductivity down to 2 K. This aspect is directly related to its 5f6 electronic configuration with J = 0. The specific heat measurements confirm the non magnetic ground state of this compound. The low temperature electronic specific heat \gamma_el = 20 mJ mol-1K-2 is clearly enhanced as compared to americium metal. All transport measurements obtained point to a metallic behavior in AmPd5Al2.
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