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We report an innovative high pressure method combining the diamond anvil celldevice with the technique of picosecond ultrasonics. Such an approach allows toaccurately measure sound velocity and attenuation of solids and liquids underpressure of tens of GPa, overcoming all the drawbacks of traditionaltechniques. The power of this new experimental technique is demonstrated instudies of lattice dynamics, stability domain and relaxation process in ametallic sample, a perfect single-grain AlPdMn quasicrystal, and rare gas, neonand argon. Application to the study of defect-induced lattice stability inAlPdMn up to 30 GPa is proposed. The present work has potential for applicationin areas ranging from fundamental problems in physics of solid and liquidstate, which in turn could be beneficial for various other scientific fields asEarth and planetary science or material research.

physical review letters

Sound velocity and absorption measurements under high pressure using  picosecond ultrasonics in diamond anvil cell. Application to the stability  study of AlPdMn