Nature Communications (Apr 2019)

Spin-current-mediated rapid magnon localisation and coalescence after ultrafast optical pumping of ferrimagnetic alloys

  • E. Iacocca,
  • T.-M. Liu,
  • A. H. Reid,
  • Z. Fu,
  • S. Ruta,
  • P. W. Granitzka,
  • E. Jal,
  • S. Bonetti,
  • A. X. Gray,
  • C. E. Graves,
  • R. Kukreja,
  • Z. Chen,
  • D. J. Higley,
  • T. Chase,
  • L. Le Guyader,
  • K. Hirsch,
  • H. Ohldag,
  • W. F. Schlotter,
  • G. L. Dakovski,
  • G. Coslovich,
  • M. C. Hoffmann,
  • S. Carron,
  • A. Tsukamoto,
  • A. Kirilyuk,
  • A. V. Kimel,
  • Th. Rasing,
  • J. Stöhr,
  • R. F. L. Evans,
  • T. Ostler,
  • R. W. Chantrell,
  • M. A. Hoefer,
  • T. J. Silva,
  • H. A. Dürr

DOI
https://doi.org/10.1038/s41467-019-09577-0
Journal volume & issue
Vol. 10, no. 1
pp. 1 – 11

Abstract

Read online

The understanding of the magnetisation evolution upon femtosecond optical pumping remains elusive. The authors perform resonant X-ray magnetic scattering measurements and multiscale simulations that reveal rapid magnetic order recovery in ferrimagnets via nonlinear magnon processes.