Thermodynamic properties of liquid gallium from picosecond acoustic velocity measurements. (10th June 2015)

• Record Type: Journal Article
• Authors: Ayrinhac, S; Gauthier, M; Le Marchand, G; Morand, M; Bergame, F; Decremps, F
• Is Part Of: Journal of physics. Volume 27:Number 27(2015)
• Publication Date: 2015-06-10
• Subjects: picosecond acoustics -- liquid gallium -- liquid–liquid phase transition -- thermodynamical properties -- equations of state; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/27/27/275103
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Due to discrepancies in the literature data the thermodynamic properties of liquid gallium are still in debate. Accurate measurements of adiabatic sound velocities as a function of pressure and temperature have been obtained by the combination of laser picosecond acoustics and surface imaging on sample loaded in diamond anvil cell. From these results the thermodynamic parameters of gallium have been extracted by a numerical procedure up to 10 GPa and 570 K. It is demonstrated that a Murnaghan equation of state accounts well for the whole data set since the isothermal bulk modulus B T has been shown to vary linearly with pressure in the whole temperature range. No evidence for a previously reported liquid–liquid transition has been found in the whole pressure and temperature range explored.