Submicron-scale spatial feature of ultrafast photoinduced magnetization reversal in TbFeCo thin film
Submicron-scale spatial feature of ultrafast photoinduced magnetization reversal in TbFeCo thin film
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DOI：
10.1063/1.3123256
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发表时间：
2009-04-20
影响因子：
4
通讯作者：
Tokura, Y.
中科院分区：
文献类型：
--
作者：
Ogasawara, T.;Iwata, N.;Tokura, Y.
Submicron-scale spatial feature of magnetization reversal dynamics induced by femtosecond optical pulse irradiation in a small external magnetic field was investigated by time-resolved magneto-optical Kerr microscopy on TbFeCo thin film. The magnetization reversal time near the magnetic domain boundary is dominated by an effective magnetic field generated from the peripheral domain by dipole-dipole interaction. The magnetization reversal is accelerated as high as 4.5 times (from 3.4 ns to 750 ps) when reducing the reversed domain size from 1.5 to 0.4 mu m due to concentration of dipole-dipole interaction.
