Ultrafast dynamics of four-state magnetization reversal in (Ga,Mn)As

Yonggang Zhu, Xinhui Zhang*, Tao Li, Xia Huang, Lifen Han, Jianhua Zhao

*Corresponding author for this work

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10 Citations (Scopus)


The ultrafast dynamics of in-plane four-state magnetization reversal from compressively strained (Ga,Mn)As film was investigated by magneto-optical Kerr rotation measurement. The magnetization reversal signal was dramatically suppressed upon pumping, and recovered slowly with time evolution. The low switching field Hc1 increased abruptly from 30 to 108 G on the first several picoseconds and recovered back to the value before optical pumping within about 500 ps, whereas the high switching field Hc2 did not change obviously upon pumping, implying a domain-wall nucleation/propagation at low fields and coherent magnetization rotation at high fields in the magnetization reversal process.

Original languageEnglish
Article number052108
JournalApplied Physics Letters
Issue number5
Publication statusPublished - 2009
Externally publishedYes

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