Subpicosecond magnetization reversal across ferrimagnetic compensation points
Subpicosecond magnetization reversal across ferrimagnetic compensation points
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DOI：
10.1103/physrevlett.99.217204
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发表时间：
2007-11-23
影响因子：
8.6
通讯作者：
Rasing, Th.
中科院分区：
文献类型：
--
作者：
Stanciu, C. D.;Tsukamoto, A.;Rasing, Th.
亚皮秒磁化反转的实验证明，超快加热的亚铁磁体在其补偿点，在外加磁场下。虽然反转是通过越过磁化补偿温度而启动的，但短反转时间与角动量补偿有关，其中由于旋磁比的发散，系统的动态特性被高度加速。这些结果证明了亚皮秒磁化反转的可行性，以前认为是不可能的。
Subpicosecond magnetization reversal is experimentally demonstrated by ultrafast heating of a ferrimagnet across its compensation points, under an applied magnetic field. While the reversal is initiated by crossing the magnetization compensation temperature, the short reversal time is related to the angular momentum compensation, where the dynamics of the system is highly accelerated owing to the divergence of the gyromagnetic ratio. These results demonstrate the feasibility of subpicosecond magnetization reversal previously believed impossible.