Physics – Condensed Matter – Materials Science
Scientific paper
2007-07-17
Physical Review Letters 100 (2008) 35502
Physics
Condensed Matter
Materials Science
Scientific paper
10.1103/PhysRevLett.100.035502
We report an innovative high pressure method combining the diamond anvil cell device with the technique of picosecond ultrasonics. Such an approach allows to accurately measure sound velocity and attenuation of solids and liquids under pressure of tens of GPa, overcoming all the drawbacks of traditional techniques. The power of this new experimental technique is demonstrated in studies of lattice dynamics, stability domain and relaxation process in a metallic sample, a perfect single-grain AlPdMn quasicrystal, and rare gas, neon and argon. Application to the study of defect-induced lattice stability in AlPdMn up to 30 GPa is proposed. The present work has potential for application in areas ranging from fundamental problems in physics of solid and liquid state, which in turn could be beneficial for various other scientific fields as Earth and planetary science or material research.
Belliard Laurent
Decremps Frederic
Gauthier Michel
Perrin Bernard
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