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Title: Dynamic compression of dense oxide (Gd3Ga5O12) from 0.4 to 2.6 TPa: Universal Hugoniot of fluid metals

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep26000· OSTI ID:1266215
 [1];  [2];  [3];  [4];  [5];  [4];  [6];  [7];  [1];  [1];  [1];  [1]
  1. Osaka Univ., Osaka (Japan)
  2. Harvard Univ., Cambridge, MA (United States)
  3. Kumamoto Univ., Kumamoto (Japan)
  4. Uppsala Univ., Uppsala (Sweden)
  5. Uppsala Univ., Uppsala (Sweden); KTH Royal Institute of Technology, Stockholm (Sweden)
  6. Ehime Univ., Ehime (Japan)
  7. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Washington State Univ., Pullman, WA (United States)

Materials at high pressures and temperatures are of great current interest for warm dense matter physics, planetary sciences, and inertial fusion energy research. Shock-compression equation-of-state data and optical reflectivities of the fluid dense oxide, Gd3Ga5O12 (GGG), were measured at extremely high pressures up to 2.6 TPa (26 Mbar) generated by high-power laser irradiation and magnetically-driven hypervelocity impacts. Above 0.75 TPa, the GGG Hugoniot data approach/reach a universal linear line of fluid metals, and the optical reflectivity most likely reaches a constant value indicating that GGG undergoes a crossover from fluid semiconductor to poor metal with minimum metallic conductivity (MMC). These results suggest that most fluid compounds, e.g., strong planetary oxides, reach a common state on the universal Hugoniot of fluid metals (UHFM) with MMC at sufficiently extreme pressures and temperatures. Lastly, the systematic behaviors of warm dense fluid would be useful benchmarks for developing theoretical equation-of-state and transport models in the warm dense matter regime in determining computational predictions.

Research Organization:
Sandia National Lab. (SNL-CA), Livermore, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1266215
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Cited By (3)

Equation of state and shock compression of warm dense sodium—A first-principles study journal February 2017
Absolute Hugoniot measurements for CH foams in the 2–9 Mbar range journal March 2018
Absolute Hugoniot Measurements for CH Foams in the 2-9 MBAR Range conference June 2018

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