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- Title
Phonon-Phason Coupling Strength in a Tsai-Type Ag-In-Yb Icosahedral Quasicrystal.
- Authors
Jinjia Zhang; Jintao Zhou; Yuki Tokumoto; Keiichi Edagawa
- Abstract
Owing to the quasiperiodic order, one independent term in the elasticity of quasicrystals (phononphason coupling) is characteristic of quasicrystals. It is not seen in conventional crystals and has continued to be a significant subject in the research field of quasicrystals. Recently, a novel method was applied to a Mackay-type AlPdMn icosahedral quasicrystal to prove the existence of phononphason coupling and to evaluate its strength based on the elasticity of quasicrystals. This study applied the method to a Tsai-type AgInYb icosahedral system to evaluate its phononphason coupling strength. We applied phonon strain to the quasicrystal at a temperature with active phason, and the induction of phason strain was successfully detected and evaluated using powder X-ray diffraction. We evaluated the phononphason coupling elastic constant of the AgInYb icosahedral quasicrystal to be 0.17 « 0.04 GPa by quantitatively comparing the measured induced phason strain with our calculation results.
- Subjects
MACKAY (Qld.); ELASTIC constants; X-ray powder diffraction; QUASICRYSTALS; COUPLING constants
- Publication
Materials Transactions, 2023, Vol 64, Issue 5, p945
- ISSN
1345-9678
- Publication type
Article
- DOI
10.2320/matertrans.MT-M2023006