Journal
PHYSICAL REVIEW B
Volume 84, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.241104
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Funding
- Max Planck Society
- LCLS
- Stanford University through Stanford Institute for Materials Energy Sciences (SIMES)
- Berkeley National Laboratory (LBNL), University of Hamburg through the BMBF [FSP 301]
- Center for Free Electron Laser Science (CFEL)
- US Department of Energy, Division of Materials Science [DE-AC02-98CH10886]
- UChicago Argonne, LLC [DE-AC02-06CH11357]
- Alexander von Humboldt Foundation
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Femtosecond midinfrared pulses are used to directly excite the lattice of the single-layer manganite La0.5Sr1.5MnO4. 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.
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