Ultrafast nanoscale magnetization dynamics probed by time-resolved EUV magnetic scattering

ORAL

Abstract

The ultrafast optical control of magnetization represents a promising avenue for next-generation memory and data storage devices. While many studies have focused on understanding the rapid transfer of angular momentum, recent measurements have revealed rich physics underlying laser modification of nanoscale magnetic textures including labyrinthine or stripe domains, skyrmions, etc. We have utilized time-resolved magnetic scattering at the FERMI free electron laser to probe the nanoscale magnetization dynamics in a [Co/Ni/Pt] multilayer following infrared (IR) laser excitation at both the Co and Ni resonant edges. Changes in the amplitude, period, and inhomogeneity of the labyrinthine- and stripe-like domain scattering patterns are compared for the Co and Ni edges. Surprisingly, Ni exhibited larger quenching in magnetization amplitude, periodicity, and peak width compared to the Co edge. Our results highlight the distinct behavior of Co and Ni, even though similar quench and recovery timescales are observed for both materials.

*E.B, R.J, N.Z.H, M.M, and R.K would like to acknowledge funding support from AFOSR Grant FA9550-23-1-0395. C.E, K.R and E.I would like to acknowledge funding support from U.S. Department of Energy, Office of Basic Energy Sciences under Award Number DE-SC0024339 (numerical simulations of field-dependent domain configuration).

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Presenters

  • Emma Bernard

    • University of California Davis

Authors

  • Emma Bernard

    • University of California Davis

  • Rahul Jangid

    • University of California, Davis

  • Nanna Zhou Hagström

    • University of California, Davis

  • Meera Madhavi

    • University of California, Davis

  • Justin shaw

    • National Institute of Standards and Technology Boulder

  • Jeffrey A Brock

    • University of California, San Diego

  • Matteo Pancaldi

    • Elettra Sincrotrone

  • Dario De Angelis

    • Elettra Sincrotrone

  • Flavio Capotondi

    • Elettra Sincrotrone

  • Emanuele Pedersoli

    • Elettra Sincrotrone

  • Cassandra Eagan

    • University of Colorado, Colorado Springs

  • Kyle Rockwell

    • University of Colorado, Colorado Springs

  • Hans T Nembach

    • National Institute of Standards and Technology
    • National Institute of Standards and Technology (NIST)

  • Mark W Keller

    • National Institute of Standards and Technology (NIST)

  • Stefano Bonetti

    • Stockholm University

  • Eric E Fullerton

    • University of California, San Diego

  • Ezio Iaccoca

    • University of Colorado, Colorado Springs

  • Thomas Joseph Silva

    • National Institute of Standards and Technology Boulder

  • Roopali Kukreja

    • University of California Davis
    • University of California, Davis