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

Silvia Boccato, Raffaella Torchio, Paola D'Angelo, Angela Trapananti, Innokenty Kantor, Vanina Recoules, Simone Anzellini, Guillaume Morard, Tetsuo Irifune, and Sakura Pascarelli
Phys. Rev. B 100, 180101(R) – Published 8 November 2019
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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.

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  • Received 22 January 2019
  • Revised 5 August 2019

DOI:https://doi.org/10.1103/PhysRevB.100.180101

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Silvia Boccato1,*, Raffaella Torchio1, Paola D'Angelo2, Angela Trapananti3, Innokenty Kantor1,†, Vanina Recoules4, Simone Anzellini5, Guillaume Morard6,‡, Tetsuo Irifune7, and Sakura Pascarelli1

  • 1European Synchrotron Radiation Facility (ESRF), Grenoble, France
  • 2Department of Chemistry, University of Rome “La Sapienza,” Rome, Italy
  • 3School of Science and Technology, Physics Division, University of Camerino, Camerino, Italy
  • 4CEA-DAM-DIF, F-91297 Arpajon, France
  • 5Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot, OX11 0DE, United Kingdom
  • 6Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie (IMPMC), Sorbonne Université, UMR CNRS 7590, Muséum National d'Histoire Naturelle, UMR 206, F-75005, Paris, France
  • 7Ehime University, Matsuyama, Japan

  • *Present address: Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie (IMPMC), Sorbonne Université, UMR CNRS 7590, Muséum National d'Histoire Naturelle, UMR 206, F-75005 Paris, France; silvia.boccato@upmc.
  • Present address: Department of Physics, Technical University of Denmark, Kgs. Lyngby, Denmark.
  • Present address: ISTerre, Université Grenoble Alpes, Grenoble, France.

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Issue

Vol. 100, Iss. 18 — 1 November 2019

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