Driving magnetic order in a manganite by ultrafast lattice excitation

Först, Michael; Tobey, R.I.; Wall, Simon; Bromberger, Hubertus; Khanna, Vikaran; Cavalieri, Adrian L.; Chuang, Y.-D.; Lee, W. S.; Moore, R.; Schlotter, W. F.; Turner, J. J.; Krupin, O.; Trigo, M.; Zheng, H.; Mitchell, J. F.; Dhesi, S. S.; Hill, J. P.; Cavalleri, Andrea

doi:10.1103/PhysRevB.84.241104

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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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http://dx.doi.org/10.1103/PhysRevB.84.241104
(Publisher version)

http://arxiv.org/abs/1105.3866
(Preprint)

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PhysRevB.84.241104.pdf
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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: https://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 La_0.5Sr_1.5MnO₄. 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.