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 language | English |
|---|---|
| Article number | 241104 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 84 |
| Issue number | 24 |
| DOIs | |
| State | Published - Dec 2 2011 |
| Externally published | Yes |