X-ray Free Electron Laser-Induced Synthesis of ϵ-Iron Nitride at High Pressures

Huijeong Hwang, Taehyun Kim, Hyunchae Cynn, Thomas Vogt, Rachel J. Husband, Karen Appel, Carsten Baehtz, Orianna B. Ball, Marzena A. Baron, Richard Briggs, Maxim Bykov, Elena Bykova, Valerio Cerantola, Julien Chantel, Amy L. Coleman, Dana Dattlebaum, Leora E. Dresselhaus-Marais, Jon H. Eggert, Lars Ehm, William J. EvansGuillaume Fiquet, Mungo Frost, Konstantin Glazyrin, Alexander F. Goncharov, Zsolt Jenei, Jaeyong Kim, Zuzana Konôpková, Jona Mainberger, Mikako Makita, Hauke Marquardt, Emma E. McBride, James D. McHardy, Sébastien Merkel, Guillaume Morard, Earl F. O'Bannon, Christoph Otzen, Edward J. Pace, Alexander Pelka, Charles M. Pépin, Jeffrey S. Pigott, Vitali B. Prakapenka, Clemens Prescher, Ronald Redmer, Sergio Speziale, Georg Spiekermann, Cornelius Strohm, Blake T. Sturtevant, Nenad Velisavljevic, Max Wilke, Choong Shik Yoo, Ulf Zastrau, Hanns Peter Liermann, Malcolm I. McMahon, R. Stewart McWilliams, Yongjae Lee

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The ultrafast synthesis of ϵ-Fe3N1+x in a diamond-anvil cell (DAC) from Fe and N2 under pressure was observed using serial exposures of an X-ray free electron laser (XFEL). When the sample at 5 GPa was irradiated by a pulse train separated by 443 ns, the estimated sample temperature at the delay time was above 1400 K, confirmed by in situ transformation of α- to γ-iron. Ultimately, the Fe and N2 reacted uniformly throughout the beam path to form Fe3N1.33, as deduced from its established equation of state (EOS). We thus demonstrate that the activation energy provided by intense X-ray exposures in an XFEL can be coupled with the source time structure to enable exploration of the time-dependence of reactions under high-pressure conditions.

Original languageEnglish
Pages (from-to)3246-3252
Number of pages7
JournalJournal of Physical Chemistry Letters
Volume12
Issue number12
DOIs
Publication statusPublished - 2021 Apr 1

Bibliographical note

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All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Physical and Theoretical Chemistry

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