Suppression of the precessional motion of magnetization in a nanostructured synthetic ferrimagnet

摘要

The suppression of the precessional oscillation of magnetization is investigated in a nanostructured synthetic ferrimagnet. Both the duration and magnitude of an applied magnetic field pulse play an important role in suppressing the precessional motion. This is in contrast to a single magnetic layer, where efficient suppression can be done by controlling the pulse duration only. The reason for this is that the precessional motion of the two magnetizations in the synthetic ferrimagnet is strongly coupled and, at the conditions of current interest, the coupled precessional motion occurs in the optic mode, where the two magnetizations oscillate in opposite directions.