Ultrafast demagnetization dynamics in the epitaxial FeGe(111) film chiral magnet

• DOI: 10.1103/physrevb.107.144429
• Publication Date: 2023-04-25T14:06:29Z
• Authors: Zizhao Gong; Wei Zhang; Jianan Liu; Zongkai Xie; Xu Yang; Jin Tang; Haifeng Du; Na Li; Xiangqun Zhang; Wei He; Zhao-hua Cheng
• Keywords: Magnetization dynamics

The exploring of ultrafast demagnetization is a significant subject for understanding the versatility spin dynamics. However, laser-induced process in chiral magnet FeGe has remained elusive. Here, we report processes film with various magnetic structures using time-resolved magneto-optical Kerr effect (TRMOKE) measurements. Our work reveals transition from one-step (type I) to two-step II) by changing ambient temperature, laser fluence, and field. We confirm that mainly results weak electron-phonon (e-p) coupling. In skyrmion phase region, TRMOKE curves demonstrate process. will further enhance magnetization loss, consequently facilitate switching pave pathway engineer devices on picosecond timescales.