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

X. Liu; P. Liu; H. C. Yuan; J. Y. Shi; H. L. Wang; S. H. Nie; F. Jin; Z. Zheng; X. Z. Yu; J. H. Zhao; H. B. Zhao; G. Lüpke

doi:10.1038/s41598-022-19378-z

Scientific Reports (Nov 2022)

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

X. Liu,
P. Liu,
H. C. Yuan,
J. Y. Shi,
H. L. Wang,
S. H. Nie,
F. Jin,
Z. Zheng,
X. Z. Yu,
J. H. Zhao,
H. B. Zhao,
G. Lüpke

Affiliations

X. Liu: Department of Applied Science, College of William and Mary
P. Liu: Department of Applied Science, College of William and Mary
H. C. Yuan: Department of Optical Science and Engineering, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Ultra-Precision Optical Manufacturing Engineering Research Center, Fudan University
J. Y. Shi: Department of Optical Science and Engineering, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Ultra-Precision Optical Manufacturing Engineering Research Center, Fudan University
H. L. Wang: State Key Laboratory of Supperlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences
S. H. Nie: State Key Laboratory of Supperlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences
F. Jin: Department of Optical Science and Engineering, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Ultra-Precision Optical Manufacturing Engineering Research Center, Fudan University
Z. Zheng: Department of Optical Science and Engineering, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Ultra-Precision Optical Manufacturing Engineering Research Center, Fudan University
X. Z. Yu: State Key Laboratory of Supperlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences
J. H. Zhao: State Key Laboratory of Supperlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences
H. B. Zhao: Department of Optical Science and Engineering, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Shanghai Ultra-Precision Optical Manufacturing Engineering Research Center, Fudan University
G. Lüpke: Department of Applied Science, College of William and Mary

DOI: https://doi.org/10.1038/s41598-022-19378-z
Journal volume & issue: Vol. 12, no. 1
pp. 1 – 5

Abstract

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Abstract 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.

Published in Scientific Reports

ISSN: 2045-2322 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Medicine; Science
Website: https://www.nature.com/srep/

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