Ultrafast optical observation of spin-pumping induced dynamic exchange coupling in ferromagnetic semiconductor/metal bilayer

被引：2
|
作者：
Liu, X. [1 ]
Liu, P. [1 ]
Yuan, H. C. [2 ]
Shi, J. Y. [2 ]
Wang, H. L. [3 ]
Nie, S. H. [3 ]
Jin, F. [2 ]
Zheng, Z. [2 ]
Yu, X. Z. [3 ]
Zhao, J. H. [3 ]
Zhao, H. B. [2 ]
Lupke, G. [1 ]
机构：
[1] Coll William & Mary, Dept Appl Sci, 251 Jamestown Rd, Williamsburg, VA 23187 USA
[2] Fudan Univ, Shanghai Ultraprecis Opt Mfg Engn Res Ctr, Dept Opt Sci & Engn, Key Lab Micro & Nano Photon Struct,Minist Educ, Shanghai 200433, Peoples R China
[3] Chinese Acad Sci, Inst Semicond, State Key Lab Supperlattices & Microstruct, Beijing 100083, Peoples R China
来源：
SCIENTIFIC REPORTS | 2022年 / 12卷 / 01期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1038/s41598-022-19378-z
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Spin angular momentum transfer in magnetic bilayers offers the possibility of ultrafast and low-loss operation for next-generation spintronic devices. We report the field- and temperature- dependent measurements on the magnetization precessions in Co2FeAl/(Ga,Mn)As by time-resolved magneto-optical Kerr effect. Analysis of the effective Gilbert damping and phase shift indicates a clear signature of an enhanced dynamic exchange coupling between the two ferromagnetic (FM) layers due to the reinforced spin pumping at resonance. The temperature dependence of the dynamic exchange-coupling reveals a primary contribution from the ferromagnetism in (Ga,Mn)As.
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页数：5
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