Specific heat measurements on single-phased AlCuFe quasicrystals
We have measured the low-temperature specific heat of samples of quasicrystalline AlCuFe alloys using an ac method. We observed weak electronic contributions in all the samples and excess vibrational contributions in phason-strained ones. The electronic contribution can account for the anomalously h...
Saved in:
| Published in: | Journal of non-crystalline solids 1993-02, Vol.153, p.357-360 |
|---|---|
| Main Authors: | , , , |
| Format: | Article |
| Language: | eng |
| Online Access: | Get full text |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | We have measured the low-temperature specific heat of samples of quasicrystalline AlCuFe alloys using an ac method. We observed weak electronic contributions in all the samples and excess vibrational contributions in phason-strained ones. The electronic contribution can account for the anomalously high resistivity using a simple pseudogap model with a realistic electronic mean free path value. The evolution of the vibrational contribution suggests that phason strains induce a softening of low-energy transverse phonon modes by decreasing the elastic shear modulus. Some implications are discussed. |
|---|---|
| ISSN: | 0022-3093 1873-4812 |