A Symmetry Microscope for Disordered Materials

ORAL

Abstract

We use position-resolved coherent speckle patterns in concert with rotational x-ray autocorrelation analysis to uncover ``hidden'' ordering at specific length scales in labyrinthine magnetic domains. Central to this measurement is understanding how finite-size effects influence the statistics of rotational cross-correlations. To this end, we present numerical simulations of domain configurations whose speckle patterns display rotational ordering similar to experimental candidates, and examine how the real-space structure of ordered and disordered domains differs. In a scanning measurement, we observe what appears to be an island of ordering in an otherwise disordered perpendicular magnetic thin film.

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Authors

  • Daniel Parks

    • Department of Physics, University of Oregon

  • Keoki Seu

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

  • Run Su

    • Department of Physics, University of Oregon

  • Eric Fullerton

    • Center for Magnetic Recording Research, University of California-San Diego
    • University of California, San Diego
    • Electrical and Computer Engineering, UC San Diego
    • CMRR, University of California at San Diego

  • Erik Shipton

    • Electrical and Computer Engineering, UC San Diego

  • Sujoy Roy

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

  • Steve Kevan

    • Physics Department, University of Oregon
    • Department of Physics, University of Oregon