Lattice excitations in icosahedral Al-Mn-Pd and Al-Re-Pd
Abstract
We report results of measurements of the specific heat C_p(T) of a large Czochralski-grown single grain of icosahedral Al_68.2Mn_9Pd_22.8 and of a high-quality single-phase sample of icosahedral Al_70Re_8.6Pd_21.4 in the temperature range between 1.6 and 280 K. For icosahedral Al_68.2Mn_9Pd_22.8, the cubic-in-T term to the low-temperature specific heat C_p(T) is distinctly larger than the expected acoustic phonon contribution calculated from the results of low-temperature measurements of the sound velocities v_l and v_t, thus indicating a large excess specific heat C_ex(T). The same conclusion can be reached for Al_70Re_8.6Pd_21.4.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 1998
- Bibcode:
- 1998APS..MAR..O706W