Q-MAC meetings in 2020/2021:

The Final International Symposium has been postponed until further notice.

Q-MAC regular meeting 2020 has been cancelled. 

Read more

Q-MAC Extension on the grounds of excellence

Q-MAC Project has been successfully extended for 1 year

Read more

Publication Detail / Abstract

M. Fechner, A. Sukhov, L. Chotorlishvili, C. Kenel, J. Berakdar, N. A. Spaldin

Magnetophononics: Ultrafast spin control through the lattice

published on Physical Review Materials on June 4, 2018
> Full text via publisher
Using a combination of first-principles and magnetization-dynamics calculations, we study the effect of the intense optical excitation of phonons on the magnetic behavior in insulating magnetic materials. Taking the prototypical magnetoelectric Cr2O3 as our model system, we show that excitation of a polar mode at 17 THz causes a pronounced modification of the magnetic exchange interactions through a change in the average Cr-Cr distance. In particular, the quasistatic deformation induced by nonlinear phononic coupling yields a structure with a modified magnetic state, which persists for the duration of the phonon excitation. In addition, our time-dependent magnetization dynamics computations show that systematic modulation of the magnetic exchange interaction by the phonon excitation modifies the magnetization dynamics. This temporal modulation of the magnetic exchange interaction strengths using phonons provides a route to creating nonequilibrium magnetic states and suggests avenues for fast manipulation of spin arrangements and dynamics.
< Back