Magnetic-Field-Independent Ultrasonic Dispersions in the Magnetically Robust Heavy Fermion System SmOs4Sb12

Tatsuya Yanagisawa, Hitoshi Saito, Hiroyuki Hidaka +8

Elastic properties of the filled skutterudite compound SmOs${}_4$Sb${}_{12}$ have been investigated by ultrasonic measurements. The elastic constant $C_{11}(\omega )$ shows two ultrasonic di…