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.

引用

页数：5