Exploring a Magnetic Phase Transition in Amorphous FeGe Using X-ray Scattering.

ORAL

Abstract

The rich phase diagram of crystalline B20 FeGe, which hosts skyrmions, spin helices, and conical helices, arises due to the competition between the Heisenberg exchange interaction, which favors collinear spins, and the Dzyaloshinskii-Moriya interaction (DMI), which favors an angle between adjacent spins. Broken inversion symmetry in the crystalline structure is typically considered to be the origin of DMI. Amorphous FeGe has no well-defined crystalline lattice but still exhibits DMI and hosts magnetic spin textures. In this talk, I present results from resonant X-ray scattering studies on a magnetic phase transition in amorphous FeGe between an ordered stripe phase and a disordered paramagnetic phase.

*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

  • Emily M Hollingworth

    • University of California, Berkeley

  • ARNAB SINGH

    • Lawrence Berkeley National Laboratory

  • Ahmad Us Saleheen

    • Lawrence Berkeley National Laboratory

  • Margaret R McCarter

    • Lawrence Berkeley National Laboratory
    • University of California, Berkeley

  • David Raftrey

    • University of California, Santa Cruz

  • Sophie A Morley

    • Lawrence Berkeley National Lab

  • Stephen D Kevan

    • Lawrence Berkeley National Laboratory

  • Peter Fischer

    • Lawrence Berkeley National Laboratory

  • Frances Hellman

    • University of California, Berkeley

  • Sujoy Roy

    • Lawrence Berkeley National Laboratory
    • LBL