Defect mediated phase transition in amorphous FeGe.

ORAL

Abstract

In this talk I report on the disappearance of a magnetic helical phase as it approaches a paramagnetic phase in thin film amorphous Fe51Ge49 (a-FeGe). a-FeGe hosts a randomized Dzyaloshinskii-Moriya interaction that competes with the exchange interaction to stabilize magnetic spin helices. By combining transmission resonant soft X-ray scattering and micromagnetic simulations, the phase transition was determined to be defect mediated with an accompanied reorientation of the helical propagation direction.

* 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

    Argonne National Laboratory

  • Ahmad Ikhwan Us Saleheen

    Lawrence Berkeley National Laboratory

  • Margaret R McCarter

    Lawrence Berkeley National Laboratory

  • David Raftrey

    University of California, Santa Cruz

  • Sophie A Morley

    Lawrence Berkeley National Lab

  • Stephen D Kevan

    Lawrence Berkeley National Laboratory

  • Peter J Fischer

    Lawrence Berkeley National Laboratory

  • Frances Hellman

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

  • Sujoy Roy

    Lawrence Berkeley National Lab