Study of Localized Character of 4f Electrons and Ultrasonic Dispersions in SmOs4Sb12 by High-Pressure High-Frequency Ultrasonic Measurements

S. Mombetsu, T. Murazumi, H. Hidaka +4

We present high-frequency ultrasonic measurements on the filled skutterudite SmOs${}_4$Sb${}_{12}$ under hydrostatic pressure. The results clarify that the 4$f$ electrons in this compo…