1201.5664 (J. -C. Griveau et al.)

Crystal structure and physical properties of AmPd5Al2    [PDF]

J. -C. Griveau, K. Gofryk, D. Bouëxière, E. Colineau, J. Rebizant

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.

View original: http://arxiv.org/abs/1201.5664