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Dynamic compression of dense oxide (Gd3Ga5O12) from 0.4 to 2.6 TPa: Universal Hugoniot of fluid metals
Osaka Univ, Grad Sch Engn, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan.;Osaka Univ, Photon Pioneers Ctr, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan..
Harvard Univ, Dept Phys, Cambridge, MA 02138 USA..
Kumamoto Univ, Shock Wave & Condensed Matter Res Ctr, Kumamoto 8608555, Japan..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
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2016 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, 26000Article in journal (Refereed) PublishedText
Abstract [en]

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, Gcl(3)Ga(5)O(12) (GGG), were measured at extremely high pressures up to 2.6TPa (26 Mbar) generated by high-power laser irradiation and magnetically driven hypervelocity impacts. Above 0.75TPa, 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. 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.

Place, publisher, year, edition, pages
2016. Vol. 6, 26000
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-298087DOI: 10.1038/srep26000ISI: 000376374400001PubMedID: 27193942OAI: oai:DiVA.org:uu-298087DiVA: diva2:944590
Available from: 2016-06-29 Created: 2016-06-29 Last updated: 2016-06-29Bibliographically approved

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Ahuja, RajeevKaewmaraya, Thanayut
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