Electronic properties and magnetism of iron at the Earth's inner core conditions
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
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
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-91012DOI: 10.1103/PhysRevB.87.115130ISI: 000316414700004OAI: oai:DiVA.org:liu-91012DiVA: diva2:615666
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)||2013-04-122013-04-112013-04-12Bibliographically approved