Aug, 2015
Laser-shock compression of magnesium oxide in the warm-dense-matter regime
PHYSICAL REVIEW E
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- Volume
- 92
- Number
- 2
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/PhysRevE.92.023103
- Publisher
- AMER PHYSICAL SOC
Magnesium oxide has been experimentally and computationally investigated in the warm-dense solid and liquid ranges from 200 GPa to 1 TPa along the principal Hugoniot. The linear approximation between shock velocity and particle velocity is validated up to a shock velocity of 15 km/s from the experimental data, this suggesting that the MgO B1 structure is stable up to the corresponding shock pressure of similar to 350 GPa. Moreover, our Hugoniot data, combined with ab initio simulations, show two crossovers between MgO Hugoniot and the extrapolation of the linear approximation line, occurring at a shock pressures of approximately 350 and 650 GPa, with shock temperatures of 8000 and 14 000 K, respectively. These crossover regions are consistent with the solid-solid (B1-B2) and the solid-liquid (B2-melt) phase boundaries predicted by the ab initio calculations.
- Link information
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- DOI
- https://doi.org/10.1103/PhysRevE.92.023103
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000359868100011&DestApp=WOS_CPL
- URL
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84939551659&origin=inward
- ID information
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- DOI : 10.1103/PhysRevE.92.023103
- ISSN : 1539-3755
- eISSN : 1550-2376
- SCOPUS ID : 84939551659
- Web of Science ID : WOS:000359868100011