Abstract
Electrical resistivity, magnetic susceptibility and specific heat measurements on a new compound, UPd 2Sn, reveal that this material exhibits valence fluctuation or Kondo lattice phenomena below a characteristic temperature ∼ 10 K. In particular, the electronic specific heat coefficient appears to be strongly temperature dependent with a maximum of ∼ 270 mJ/mole U−K 2 at 9.7 K and an extrapolated value of ∼ 70 mJ/mole U−K 2 at 0 K. The compound UPd 2Sn was expected to crystallize in the same structure as the family of cubic Heusler alloys, but instead, crystallized in a more complicated structure which appears to be orthorhombic. The compound can be characterized as a nonmagnetic, nonsuperconducting heavy electron material.
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