Fast magnetization reversal of GdFeCo induced by femtosecond laser pulses
Fast magnetization reversal of GdFeCo induced by femtosecond laser pulses
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DOI：
10.1103/physrevb.65.012413
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发表时间：
2002-01-01
影响因子：
3.7
通讯作者：
Ohta, N
中科院分区：
文献类型：
--
作者：
Hohlfeld, J;Gerrits, T;Ohta, N
非晶态Gd23.1Fe71.9Co5.0的磁化反转表现为亚皮秒的磁化坍缩，随后是较慢的磁化反转。反转动力学用布洛赫方程很好地描述了反转时间，它不依赖于温度，但随着泵流量的增加而强烈减少。与外部饱和场和剩余物场数据的比较，开辟了将单个域内温度诱导效应的贡献与场诱导域形成相关的贡献分开的途径。
Pump-pulse induced magnetization reversal of amorphous Gd23.1Fe71.9Co5.0 showed a subpicosecond magnetization collapse followed by a slower reversal. The reversal dynamics is well described by the Bloch equation via a reversal time that does not depend on temperature, but strongly decreases with increasing pump fluence. A comparison to data obtained in external saturation field and in remanence opened the way to separate the contributions due to temperature induced effects within single domains from those related to field induced domain formation.