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Journal Article

Driving magnetic order in a manganite by ultrafast lattice excitation

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Wall,  Simon
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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PhysRevB.84.241104.pdf
(Publisher version), 769KB

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Citation

Först, M., Tobey, R., Wall, S., Bromberger, H., Khanna, V., Cavalieri, A. L., et al. (2011). Driving magnetic order in a manganite by ultrafast lattice excitation. Physical Review B, 84(24): 241104(R). doi:10.1103/PhysRevB.84.241104.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0028-15CF-4
Abstract
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.