Abstract

We report a detailed investigation of the binary compound CeIr 5. Owing to difficulty in being able to prepare single-phase CeIr 5, we studied the low-temperature properties of CeIr 5, by investigating the doping-stabilized CeIr 5, systems (Th 1− x Ce x )Ir 5, x ⩽ 0.7, and Ce(Pt 1− x Ir x ) 5, x ⩽ 0.85. Via measurements of the specific heat and magnetic susceptibility, we observed spin fluctuations in the Ce(Pt 1− x Ir x ) 5 system, arising from a Pauli paramagnetic state, and superconductivity in (Th 1− x Ce x )Ir 5.

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