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Electrical Resistivity of ε-Fe at High Pressures of Stepwise Shock Compression

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Abstract—In situ electrical resistance measurements are performed on samples of iron with a hexagonal close–packed lattice (ε-Fe), compressed and heated by stepwise shock loading. Equations of state for ε-Fe are constructed. The obtained experimental results are mathematically simulated in the hydrocode based on the developed equations of state. The modeling results are used to reconstruct the volume temperature dependence of the ε-Fe electrical resistivity at pressures of ≈20–70 GPa and temperatures of ≈750–950 K. The volume–temperature dependence of the ε-Fe thermal conductivity coefficient is calculated according to the Wiedemann–Franz law. The results obtained for the electrical and thermal conductivity of shock compressed and heated ε-Fe are compared with literature experimental and theoretical data for iron and silicon iron.

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Funding

This study was financially supported by the Ministry of Science and Higher Education of the Russian Federation (Agreement with the Joint Institute for High Temperatures of the Russian Academy of Sciences No. 075-15-2020-785 dated September 23, 2020).

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Russia

    A. M. Molodets & A. A. Golyshev

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  1. A. M. Molodets
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  2. A. A. Golyshev
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Correspondence to A. M. Molodets.

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Molodets, A.M., Golyshev, A.A. Electrical Resistivity of ε-Fe at High Pressures of Stepwise Shock Compression. Izv., Phys. Solid Earth 59, 531–543 (2023). https://doi.org/10.1134/S1069351323040080

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  • DOI: https://doi.org/10.1134/S1069351323040080

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