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.

*University of California Multicampus Research Programs and Initiatives (grant MRP-17-454963).U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Contract No. DE-AC02-05-CH11231 (NEMM program MSMAG)

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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