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X-ray Photon Fluctuation Spectroscopy on amorphous FeGe near magnetic phase transition at LCLS-II.

ORAL

Abstract

Non-trivial magnetic spin textures, e.g. Skyrmions, have attracted attention lately due to their potential application in data storage and unique topological protection. Despite this, much is still unknown about the stabilization of these textures and how the symmetric (Hesienberg) and antisymmetric (Dzyaloshinskii-Moriya interaction) exchange couplings compete. In this talk, I present results from a recent experiment at LCLS-II where we probed sub-nanosecond time scales near the magnetic phase transition of amorphous FeGe. We investigated the transition between a helical and paramagnetic state, mediated by temperature. This work not only provides further insight into the competition between symmetric and antisymmetric exchange in chiral materials but also provides a blueprint for future sub-nanosecond experiments at X-ray Free Electron Lasers.

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Presenters

  • Ryan Tumbleson

    University of California, Santa Cruz

Authors

  • Ryan Tumbleson

    University of California, Santa Cruz

  • Nicolas Burdet

    SLAC - Natl Accelerator Lab

  • Emily M Hollingworth

    University of California, Berkeley and Lawrence Berkeley National Laboratory, University of California, Berkeley

  • ARNAB SINGH

    Lawrence Berkeley National Laboratory

  • Ahmad Us Saleheen

    Lawrence Berkeley National Laboratory

  • Margaret R McCarter

    University of California, Berkeley, Lawrence Berkeley National Laboratory

  • David Raftrey

    University of California, Santa Cruz

  • Vincent Esposito

    SLAC - Natl Accelerator Lab

  • Assefa Tadesse

    SLAC - Natl Accelerator Lab

  • Sophie A Morley

    Lawrence Berkeley National Laboratory

  • Daisy O'Mahoney

    University of California, Berkeley

  • Franz-Josef Decker

    SLAC - Natl Accelerator Lab

  • Alexander Reid

    SLAC - Natl Accelerator Lab, SLAC, SLAC National Accelerator Laboratory

  • Georgi Dakovski

    SLAC - Natl Accelerator Lab

  • Stephen D Kevan

    Lawrence Berkeley National Laboratory

  • Peter J Fischer

    Lawrence Berkeley National Laboratory

  • Frances Hellman

    University of California, Berkeley, University of California, Berkeley and Lawrence Berkeley National Laboratory, APS President

  • Joshua J Turner

    SLAC - Natl Accelerator Lab

  • Sujoy Roy

    Lawrence Berkeley National Laboratory, ALS, Lawrence Berkeley National Lab, LBL