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

Huijeong Hwang 1 Taehyun Kim 1 Hyunchae Cynn 2 Thomas Vogt 3 Rachel J. Husband 4 Karen Appel Carsten Baehtz Orianna B. Ball 5 Marzena A. Baron 6 Richard Briggs 2 Maxim Bykov 7 Elena Bykova 7 Valerio Cerantola Julien Chantel 8 Amy L. Coleman 2 Dana Dattlebaum 9 Leora E. Dresselhaus-Marais 2 Jon H. Eggert 2 Lars Ehm 10 William J. Evans 2 Guillaume Fiquet 6 Mungo Frost Konstantin Glazyrin 4 Alexander F. Goncharov 7 Zsolt Jenei 2 Jaeyong Kim 11 Zuzana Konôpková Jona Mainberger 4 Mikako Makita Hauke Marquardt 12 Emma E. Mcbride James D. Mchardy 5 Sébastien Merkel 8 Guillaume Morard 6, 13 Earl F. O’bannon 2 Christoph Otzen 4 Edward J. Pace 5 Alexander Pelka Charles M. Pépin 14, 15 Jeffrey S. Pigott 9, 16 Vitali B. Prakapenka 17 Clemens Prescher 4 Ronald Redmer 18 Sergio Speziale 19 Georg Spiekermann 20 Cornelius Strohm 4 Blake T. Sturtevant 9 Nenad Velisavljevic 2 Max Wilke 20 Choong-Shik Yoo 21 Ulf Zastrau Hanns-Peter Liermann 4 Malcolm I. Mcmahon 5 R. Stewart Mcwilliams 5 Yongjae Lee 1
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.
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https://hal.univ-lille.fr/hal-03219661
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Soumis le : jeudi 6 mai 2021 - 15:36:08
Dernière modification le : samedi 15 mai 2021 - 03:28:59

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Huijeong Hwang, Taehyun Kim, Hyunchae Cynn, Thomas Vogt, Rachel J. Husband, et al.. X-ray Free Electron Laser-Induced Synthesis of ε-Iron Nitride at High Pressures. The Journal of Physical Chemistry Letters, 2021, The Journal of Physical Chemistry Letters, 12 (12), pp.3246-3252. ⟨10.1021/acs.jpclett.1c00150⟩. ⟨hal-03219661⟩

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