High-pressure experimental and theoretical investigations on the fluorite structured compound AuAl{sub 2}

Journal Article · Fri Jul 01 00:00:00 EDT 2005 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.72.024112· OSTI ID:20719120

Garg, Alka B; Verma, Ashok K; Vijayakumar, V; Rao, R S; Godwal, B K ^[1]

---

1. High Pressure Physics Division, Purnima Laboratories, Bhabha Atomic Research Centre, Mumbai 400085 (India)

Diamond anvil cell (DAC) based resistance measurements are carried out in AuAl{sub 2} to the pressures of about 25 GPa for the first time. The data indicate possibility of phase transition around 12 GPa. High pressure data obtained using Elettra synchrotron source confirm the transformation of AuAl{sub 2} from ambient CaF{sub 2} to orthorhombic phase. The high precision P-V data when transformed to universal equation of state does not show any deviation from linearity. The first principles electronic band structure calculations up to these pressures in the cubic phase do not reveal any change corroborating the experimental findings of nonobservation of electronic topological transition in this compound.

• OSTI ID: 20719120
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 72, Issue 2; Other Information: DOI: 10.1103/PhysRevB.72.024112; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALUMINIUM ALLOYS
CUBIC LATTICES
ELECTRIC CONDUCTIVITY
EQUATIONS OF STATE
GOLD ALLOYS
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
SYNCHROTRON RADIATION SOURCES
TOPOLOGY