We have performed ultrasonic measurements of the Kondo compound CexLa1-xB6 at low temperatures. A quenching of the quadrupolar moment of the Λ8 ground state in Ce0.03La0.97B6. A remarkable increase of the ultrasonic attenuation due to the quadrupolar fluctuations in Ce0.5La0.5B6 has been found. The effect of the Kondo singlet formation at very low temperatures is discussed.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering