Abstract
The clathrate compound Eu 8 Ga 16 Ge 30 with the type-I cubic structure is expected to show rattling motion of Eu atom which is an anomalous off-center oscillation. To investigate an influence of rattling motion to the lattice system of Eu 8 Ga 16 Ge 30 , we have measured temperature T dependence of elastic modulus ( C 11 - C 12 ) / 2 and ultrasonic attenuation α of a single-crystalline sample in the T range between 4.2 and 150 K for ultrasonic frequencies from 20 to 150 MHz . We found ultrasonic frequency dependence in both ( C 11 - C 12 ) / 2 and α , suggesting rattling motion of Eu atoms between 50 and 100 K . We obtained a relaxation time 6.0 × 10 - 11 s and an excitation energy 420 K of rattling motion with Γ 3 symmetry.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
