Spin fluctuation temperatures in mixed valence materials studied by magnetic susceptibility

Abstract The magnetic susceptibility χ ( T ) of a mixed valence (MV) system CeRu 3 Si 2 has been measured in the temperature T range between 2 and 300 K. χ ( T ) is independent of T below 100 K, and slightly increases with increasing T . We estimated the spin fluctuation temperature T sf and found a good scaling of χ ( T ) T / C vs T / T sf among MV compounds CeRu 3 Si 2 , CeSn 3 , CeRu 2 , CeOs 3 B 2 and CeRu 3 B 2 . T sf is compared and found to rule the electronic properties in these compounds.