Measurement of domain wall dynamics in response to ultrafast optical pumping by use of coherent X-ray scattering at the Linac Coherent Light Source

ORAL

Abstract

We used coherent X-ray resonant magnetic scattering at the Linac Coherent Light Source to study the dynamic response of a nanoscale magnetic domain network in a [Co90Fe10/Ni] multilayer after ultrafast optical pumping. The signal to noise was sufficient for us to observe both the first and third order magnetic diffraction rings produced by the domain network, allowing us to interrogate how ultrafast optical pumping affects details of the domain wall structure. We found that the first and third order diffraction rings exhibit different dynamics. Our results suggest that the magnetization dynamics of magnetic features depends on their size, and that the ultrafast dynamics of the domains and domain walls are different when subject to ultrafast optical pumping. We will present an analysis of the data in terms of ultrafast generation of spin currents that flow between the domains.

*The authors would like to acknowledge support from the Department of Energy (DOE) Office of Basic Energy Sciences X-Ray Scattering Program Awards No. DE-SC0002002 and DE-SC0018237.

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Presenters

  • Dmitriy Zusin

    • University of Colorado Boulder / JILA
    • JILA, Department of Physics, University of Colorado Boulder and National Institute of Standards and Technology
    • Department of Physics and JILA, University of Colorado and NIST
    • Univ of Colorado - Boulder
    • Univ of Colorado-Boulder

Authors

  • Dmitriy Zusin

    • University of Colorado Boulder / JILA
    • JILA, Department of Physics, University of Colorado Boulder and National Institute of Standards and Technology
    • Department of Physics and JILA, University of Colorado and NIST
    • Univ of Colorado - Boulder
    • Univ of Colorado-Boulder

  • TianMin Liu

    • Stanford University / LCLS

  • Loic Le Guyader

    • European X-Ray Free-Electron Laser Facility GmbH

  • Alexander Reid

    • SLAC National Accelerator Laboratory

  • William Schlotter

    • SLAC National Accelerator Laboratory

  • Daniel Higley

    • Stanford University / LCLS

  • Phoebe Tengdin

    • University of Colorado Boulder / JILA
    • Department of Physics and JILA, University of Colorado and NIST
    • Univ of Colorado - Boulder
    • Univ of Colorado-Boulder

  • Christian Gentry

    • University of Colorado Boulder / JILA
    • Department of Physics and JILA, University of Colorado and NIST
    • Univ of Colorado - Boulder
    • Univ of Colorado-Boulder

  • Adam Blonsky

    • University of Colorado Boulder / JILA
    • Department of Physics and JILA, University of Colorado and NIST
    • Univ of Colorado - Boulder
    • Univ of Colorado-Boulder

  • Sheena Patel

    • Center for Memory Research, Univ of California - San Diego
    • University of California San Diego

  • Anatoly Shabalin

    • Department of Physics, Univ of California - San Diego
    • University of California San Diego

  • Nelson Hua

    • University of California San Diego
    • University of California, San Diego

  • Stjepan Hrkac

    • University of California San Diego

  • Ezio Iacocca

    • Univ of Colorado - Boulder
    • Dept. of Applied Mathematics, Univ. of Colorado; Dept. of Physics, Division for Theoretical Physics, Chalmers Univ. of Technology

  • Hans Nembach

    • JILA,University of Colorado
    • Quantum Electromagnetics Division, NIST
    • NIST - Boulder
    • NIST

  • Justin Shaw

    • National Institute for Standards and Technology
    • Quantum Electromagnetics Division, NIST
    • NIST - Boulder
    • NIST

  • Mark Hoefer

    • Univ of Colorado - Boulder

  • Henry Kapteyn

    • Physics, Univ of Colorado - Boulder
    • Physics, University of Colorado Boulder
    • University of Colorado Boulder / JILA
    • JILA, Department of Physics, University of Colorado Boulder and National Institute of Standards and Technology
    • Department of Physics and JILA, University of Colorado and NIST
    • Univ of Colorado - Boulder
    • Univ of Colorado-Boulder

  • Margaret Murnane

    • Physics, Univ of Colorado - Boulder
    • Physics, University of Colorado Boulder
    • University of Colorado Boulder / JILA
    • JILA, Department of Physics, University of Colorado Boulder and National Institute of Standards and Technology
    • Department of Physics and JILA, University of Colorado and NIST
    • Univ of Colorado - Boulder
    • Univ of Colorado-Boulder

  • Eric Fullerton

    • Center for Memory Research, Univ of California - San Diego
    • University of California San Diego
    • University of California, San Diego
    • Center for Memory and Recording Research, University of California, San Diego
    • Center for Memory Recording Research, University of California San Diego
    • Center for Memory and Recording Research, University of California San Diego
    • Center for Memory and Recording Research, Univ of California - San Diego

  • Hermann Durr

    • SLAC National Accelerator Laboratory

  • Thomas Silva

    • Quantum Electromagnetics Division, NIST
    • NIST