EXTREMELY LOW DENSITY OF STATES IN CePd7

Abstract
The low temperature specific heat and magnetic susceptibility measurements, up to room temperature, on CePd 7 are reported. The Sommefeld coefficient γ and the Pauli susceptibility χo were found to have the lowest values within the Ce compounds: γ = 9.8 mJ/mole K 2 and χo = 0.14 × 10−3 emu/mole . The ratio χo/γ = 0.014 emu K 2/ J is that of a free electron, instead of an intermediate valence system (0.036 emu K 2/ J ). Such a value suggests complete delocalization of the Ce 4f electrons.

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