Driving magnetic order in a manganite by ultrafast lattice excitation

  • M. Först
  • , R. I. Tobey
  • , S. Wall
  • , H. Bromberger
  • , V. Khanna
  • , A. L. Cavalieri
  • , Y. D. Chuang
  • , W. S. Lee
  • , R. Moore
  • , W. F. Schlotter
  • , J. J. Turner
  • , O. Krupin
  • , M. Trigo
  • , H. Zheng
  • , J. F. Mitchell
  • , S. S. Dhesi
  • , J. P. Hill
  • , A. Cavalleri

Research output: Contribution to journalArticlepeer-review

143 Scopus citations

Abstract

Femtosecond midinfrared pulses are used to directly excite the lattice of the single-layer manganite La 0.5Sr 1.5MnO 4. Magnetic and orbital orders, as measured by femtosecond resonant soft x-ray diffraction with an x-ray free-electron laser, are reduced within a few picoseconds. This effect is interpreted as a displacive exchange quench, a prompt shift in the equilibrium value of the magnetic- and orbital-order parameters after the lattice has been distorted. Control of magnetism through ultrafast lattice excitation may be of use for high-speed optomagnetism.

Original languageEnglish
Article number241104
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number24
DOIs
StatePublished - Dec 2 2011
Externally publishedYes

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