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Compression of liquid Ni and Co under extreme conditions explored by x-ray absorption spectroscopy

DOI: 10.1103/PhysRevB.100.180101 DOI Help

Authors: Silvia Boccato (European Synchrotron Radiation Facility (ESRF)) , Raffaella Torchio (European Synchrotron Radiation Facility (ESRF)) , Paola D'Angelo (University of Rome) , Angela Trapananti (University of Camerino) , Innokenty Kantor (European Synchrotron Radiation Facility (ESRF)) , Vanina Recoules (CEA-DAM-DIF) , Simone Anzellini (Diamond Light Source; CEA) , Guillaume Morard (Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie (IMPMC), Sorbonne Université, UMR CNRS 7590, Muséum National d'Histoire Naturelle) , Tetsuo Irifune (Ehime University) , Sakura Pascarelli (European Synchrotron Radiation Facility (ESRF))
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 100

State: Published (Approved)
Published: November 2019

Abstract: The compression of liquid nickel and cobalt has been investigated up to 102 and 83 GPa, respectively, by x-ray absorption spectroscopy at the Ni and Co K edges, using laser-heated diamond anvil cell. A shortening of about 8%–10% of the metal bond distances is observed in the pressure range considered and the experimental results are confirmed by theoretical calculations. Ab initio quantum molecular dynamics calculations have been performed, providing a model pair distribution function for cobalt, used as a starting model in the extended x-ray absorption fine structure analysis. The specific volume of the liquid has also been estimated and compared to calculations in the literature. This work sets the basis for x-ray absorption spectroscopy studies of liquid metals under extreme conditions with potentially important implications for the understanding of Earth and planetary interiors.

Journal Keywords: Earth's interior; Phase diagrams; Pressure effects; Structural properties; Liquid metals; Transition metals; X-ray absorption fine structure spectroscopy; X-ray absorption spectroscopy

Subject Areas: Materials, Physics, Earth Science

Facility: European Synchrotron Radiation Facility (ESRF)

Added On: 12/11/2019 15:40

Discipline Tags:

Molecular Physics Earth Sciences & Environment Geology Materials Science Metallurgy Physics Chemistry Planetary Geology

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