Retrieving pulse profiles from pump-probe measurements on magnetization dynamics
Retrieving pulse profiles from pump-probe measurements on magnetization dynamics
复制标题
从磁化动力学的泵浦探针测量中检索脉冲轮廓
DOI：
10.1063/1.1667440
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发表时间：
2004
影响因子：
3.2
通讯作者：
B. Koopmans
中科院分区：
文献类型：
--
作者：
C. Jozsa;J. Rietjens;M. Kampen;E. Smalbrugge;M. Smit;W. D. Jonge;B. Koopmans
本文提出了一种在泵浦-探针式磁化动力学测量中反向跟踪磁场脉冲的方法。矢量求解的Landau-Lifshitz-吉尔伯特方程为我们的字段引起的测量几何产生的字段脉冲轮廓，满足理论预期的100 ps的时间尺度。将该方法应用于我们早期的全光型泵浦-探测测量中，光脉冲触发超快各向异性场脉冲的说法得到了直接的证明：我们得到了一个由三角峰型、半峰全宽<5 ps的脉冲组成的脉冲，该脉冲位于非常快的上升阶跃状轮廓之上。将该方法应用于其他不那么琐碎的泵浦-探测方案，可以有助于新型磁记录技术的发展。
A method for back-tracing magnetic field pulses in pump-probe-type magnetization dynamics measurements is presented. Solving vectorially the Landau–Lifshitz–Gilbert equation for our field-induced measurement geometry yields field pulse profiles fulfilling the theoretical expectations on a 100 ps timescale. Applying the method to our earlier, all-optical-type pump-probe measurements, the claim that the optical pulse triggers an ultrafast anisotropy field pulse gets a direct proof: we derive a pulse consisting of a delta-peak type, full width at half maximum <5 ps impulse on top of a very fast rising step-like profile. Application of the method to other, less trivial pump-probe schemes can contribute to the development of novel type magnetic recording technologies.