Spin texture dynamics in amorphous Fe-Ge films

ORAL

Abstract

Logic and memory devices created from novel spin-orbit materials are scalable and energy-efficient alternate to the current CMOS devices. Recent studies show that spin textures and Skyrmions that have been observed in well-known ferrimagnet FeGe can also form in pseudo-amorphous FexG1-x films (a-FeGe) due to a local DMI interaction. Yet, the exact magnetic field-temperature phase diagram and the nature of the magnetic transitions are yet to be understood. We used resonant coherent x-ray scattering and studied magnetic order parameters and spin texture dynamics across two magnetic phase transitions in a-FeGe. Characteristic curvatures from respective one-time correlation functions indicate the distinct dynamical behavior of the helical and skyrmion textures.

*This work was primarily funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division under Contract No. DE-AC02-05-CH11231 within the NEMM program (MSMAG).

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Presenters

  • Xiaoqian Chen

    • Brookhaven National Laboratory

Authors

  • Xiaoqian Chen

    • Brookhaven National Laboratory

  • Robert Streubel

    • Physics and Astronomy, University of Nebraska - Lincoln
    • Condensed Matter & Materials Physics, University of Nebraska, Lincoln
    • Lawrence Berkeley National Laboratory

  • Dinah Simone D Bouma

    • University of California Berkeley

  • Roland Koch

    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Lab

  • Sophie A Morley

    • Lawrence Berkeley National Laboratory
    • lawrence National Lab

  • Stephen Douglas Kevan

    • Lawrence Berkeley National Laboratory

  • Frances Hellman

    • Physics, University of California, Berkeley
    • Lawrence Berkeley National Laboratory
    • University of California Berkeley

  • Peter Fischer

    • Lawrence Berkeley National Laboratory
    • University of California, Santa Cruz

  • Sujoy Roy

    • Advanced Light Source
    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Laboratory