Ultrafast magnetization recovery and damping of Pt (Cu) buffered [Co/Ni]6 multilayers with different substrates

被引：0

作者：

Zhang, Linlin ^{[1
]}

He, Xiaodong ^{[2
]}

Wang, Jinshan ^{[1
]}

Tong, Liping ^{[1
]}

Chen, Siwen ^{[1
]}

Meng, Weidong ^{[1
]}

Liu, Zhu ^{[1
]}

Zhou, Xiaowei ^{[1
]}

Xi, Li ^{[2
]}

Zuo, Yalu ^{[2
]}

Ren, Yang ^{[1
]}

机构：

[1] Yunnan Univ, Sch Phys & Astron, Kunming 650091, Peoples R China

[2] Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2024年 / 605卷

基金：

中国国家自然科学基金;

关键词：

Perpendicular magnetic anisotropy; Ultrafast demagnetization; Magnetization precession; Co/Ni] multilayers; FILMS; ANISOTROPY; DYNAMICS;

D O I：

10.1016/j.jmmm.2024.172343

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We systematically investigated the influences of the Pt (Cu) seed layers on the ultrafast demagnetization and magnetization precession of [Co/Ni]6 multilayers with different substrates (Si, glass, sapphire and ITO glass), respectively, using the time-resolved magneto-optical Kerr effect technique. On the one hand, for the Pt (Cu) seed layers, the demagnetization time tau D is almost a constant with various substrates. It infers that only the magnetic layer dominates the tau D. However, the magnetization recovery time tau R is significantly influenced by both the seed layers and substrates, ascribed to the spin-lattice coupling. The experimental data is good agreement with theoretical calculations using the three-temperature model. On the other hand, the damping parameter alpha s is independent of Ku, but is modulated by both the seed layers and substrates, which is influenced by the spin pump effect and interfacial roughness. The results could be helpful to design the potential application of the high speed spintronic devices.

引用

页数：7

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