Amorphization Effect for Kondo Semiconductor CeRu₂Al₁₀

Abstract

We measured the magnetic susceptibility , electrical resistivity , and specific heat of a sputtered amorphous (a-)CeRu 2 Al 10 alloy. value for a-CeRu 2 Al 10 alloy follows a Curie-Weiss paramagnetic behavior in the high-temperature region, and magnetic transition was not observed down to 2 K. The effective paramagnetic moment eff is 1.19 /Ce-atom. The resistivity shows a typical disordered alloy behavior, that is, small temperature dependence for the whole temperature range. We observed an enhancement of and / in the low-temperature region of < 10 K. The enhancement in is suppressed by applying a magnetic field. It is suggested that this behavior is caused by the Kondo effect.