Driving magnetic order in a manganite by ultrafast lattice excitation

Article

关键词: CHARGE;    MAGNETORESISTANCE;    DISTORTION;   

DOI  :  10.1103/PhysRevB.84.241104

来源: SCIE

【 摘 要 】

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.

【 授权许可】

Free