氦金属薄膜超快激光激发后深度分辨磁化动力学
材料科学
2026-03-13 v1
摘要
我们对激光激发后铁磁性 Fe 薄膜进行时间分辨 x 射线共振磁学反射率测量,以实现对瞬态结构和磁深度轮廓的纳米空间和皮秒时间分辨率的同步探测。结果显示,在光学激发后前几皮秒内,Fe 层的磁化强度在 buried interface 附近呈现强烈非均匀性。通过将实验结果与基于微观三温度模型和激光诱导自旋电流的模拟进行比较,我们证明了局部和非局部角动量转移现象同时发生。几皮秒后,磁化恢复到平衡态,薄膜总厚度开始周期性振荡,因激光引起的应力导致厚度最大扩张约为整个薄膜厚度的 1.3%。
引用
@article{arxiv.2603.11913,
title = {Depth-resolved magnetization dynamics in Fe thin films after ultrafast laser excitation},
author = {Valentin Chardonnet and Marcel Hennes and Romain Jarrier and Renaud Delaunay and Nicolas Jaouen and Marion Kuhlmann and Cyril Leveillé and Clemens von Korff Schmising and Daniel Schick and Kelvin Yao and Xuan Liu and Gheorghe S. Chiuzbăian and Jan Lüning and Boris Vodungbo and Emmanuelle Jal},
journal= {arXiv preprint arXiv:2603.11913},
year = {2026}
}