{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T02:38:07Z","timestamp":1792463887762,"version":"4.5.0"},"reference-count":57,"publisher":"American Physical Society (APS)","issue":"25","license":[{"start":{"date-parts":[[2024,12,18]],"date-time":"2024-12-18T00:00:00Z","timestamp":1734480000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100010661","name":"Horizon 2020 Framework Programme","doi-asserted-by":"publisher","award":["847439"],"award-info":[{"award-number":["847439"]}],"id":[{"id":"10.13039\/100010661","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100010665","name":"H2020 Marie Sk\u0142odowska-Curie Actions","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100010665","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100011664","name":"SLAC National Accelerator Laboratory","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100011664","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000015","name":"U.S. Department of Energy","doi-asserted-by":"publisher","award":["DE AC02-76SF0051"],"award-info":[{"award-number":["DE AC02-76SF0051"]}],"id":[{"id":"10.13039\/100000015","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Theory Institute for Materials and Energy Spectroscopies"},{"name":"LULI Laboratory"}],"content-domain":{"domain":["journals.aps.org"],"crossmark-restriction":true},"short-container-title":["Phys. Rev. Lett."],"accepted":{"date-parts":[[2024,9,13]]},"abstract":"<jats:p>Studying the properties and phase diagram of iron at high-pressure and high-temperature conditions has relevant implications for Earth\u2019s inner structure and dynamics and the temperature of the inner core boundary (ICB) at 330\u00a0GPa. Also, a hexagonal-closed packed to body-centered cubic (bcc) phase transition has been predicted by many theoretical works but observed only in a few experiments. The recent coupling of high-power laser with advanced x-ray sources from synchrotrons allows for novel approaches to address these issues. Here, we present a study on shock compressed iron up to 270\u00a0GPa and 5800\u00a0K probed by single-pulse (100\u00a0ps FWHM) x-ray absorption spectroscopy (XAS). Based on the analysis of the XAS spectra, we provide structural identification and bulk temperature measurements along the Hugoniot up to the melting. These results rule out the predicted transition to a high-temperature bcc phase and allow one to discriminate among existing equations of state models and melting curves. In particular, we report the first bulk temperature measurement in shock compressed iron on the melting plateau at 240(20)\u00a0GPa and 5345(600)\u00a0K. The melting curve resulting from our work extrapolates to a temperature of 6202(514)\u00a0K at 330\u00a0GPa and represents a refined upper bound for the ICB temperature.<\/jats:p>\n                  <jats:sec>\n                    <jats:title\/>\n                    <jats:supplementary-material>\n                      <jats:permissions>\n                        <jats:copyright-statement>Published by the American Physical Society<\/jats:copyright-statement>\n                        <jats:copyright-year>2024<\/jats:copyright-year>\n                      <\/jats:permissions>\n                    <\/jats:supplementary-material>\n                  <\/jats:sec>","DOI":"10.1103\/physrevlett.133.254101","type":"journal-article","created":{"date-parts":[[2024,12,18]],"date-time":"2024-12-18T10:14:15Z","timestamp":1734516855000},"update-policy":"https:\/\/doi.org\/10.1103\/crossmark-policy","source":"Crossref","is-referenced-by-count":21,"title":["New Constraints on the Melting Temperature and Phase Stability of Shocked Iron up to 270\u00a0GPa Probed by Ultrafast X-Ray Absorption Spectroscopy"],"prefix":"10.1103","volume":"133","author":[{"given":"S.","family":"Balugani","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02550n020","id-type":"ROR","asserted-by":"publisher"}],"name":"European Synchrotron Radiation Facility (ESRF)"},{"id":[{"id":"https:\/\/ror.org\/042tfbd02","id-type":"ROR","asserted-by":"publisher"}],"name":"Institut Polytechnique de Paris"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1860-0982","authenticated-orcid":true,"given":"J.\u2009A.","family":"Hernandez","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02550n020","id-type":"ROR","asserted-by":"publisher"}],"name":"European Synchrotron Radiation Facility 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