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Electronic properties and magnetism of iron at the Earth's inner core conditions
Ecole Polytech, France.
AIST, Japan.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, The Institute of Technology.
Royal Institute Technology, Sweden.
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2013 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 87, no 11Article in journal (Refereed) Published
Abstract [en]

We employ state-of-the-art ab initio simulations within the dynamical mean-field theory to study three likely phases of iron (hcp, fcc, and bcc) at the Earth's core conditions. We demonstrate that the correction to the electronic free energy due to correlations can be significant for the relative stability of the phases. The strongest effect is observed in bcc Fe, which shows a non-Fermi-liquid behavior, and where a Curie-Weiss behavior of the uniform susceptibility hints at a local magnetic moment still existing at 5800 K and 300 GPa. We predict that all three structures have sufficiently high magnetic susceptibility to stabilize the geodynamo.

Place, publisher, year, edition, pages
American Physical Society , 2013. Vol. 87, no 11
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-91012DOI: 10.1103/PhysRevB.87.115130ISI: 000316414700004OAI: oai:DiVA.org:liu-91012DiVA: diva2:615666
Note

Funding Agencies|Swedish e-science Research Centre (SeRC)||Swedish Research Centre for Advanced Functional Materials (AFM)||Linkoping Linnaeus Initiative for Novel Functional Materials (LiLI-NFM)||Swedish Foundation for Strategic Research (SSF)|10-0026|Swedish Research Council (VR)|621-2011-4426|PHD DALEN Project|26228RM|German Science Foundation (DFG)||German Ministry for Education and Research (BMBF)||

Available from: 2013-04-12 Created: 2013-04-11 Last updated: 2017-12-06Bibliographically approved

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Simak, SergeyAbrikosov, Igor

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