Manipulations of Spin Waves by Photoelectrons in Ferromagnetic/Non‐Ferromagnetic Alloyed Film

Spin waves are considered to be an alternative carrier with great promise for information sensing. The feasible excitation and low‐power manipulation of spin waves still remain a challenge. In this regard, natural light enablings spin‐wave tunability in Co 60 Al 40 ‐alloyed film is investigated. A r...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2023-10, Vol.35 (40), p.e2303810-e2303810
Main Authors: Zhao, Meng, Zhao, Yifan, Li, Yaojin, Dong, Guohua, He, Zhexi, Du, Yujing, Jiang, Yuxuan, Wu, Shaoyuan, Wang, Chenying, Zhao, Libo, Jiang, Zhuangde, Liu, Ming, Zhou, Ziyao
Format: Article
Language:English
Subjects:
Critical angle
Ferromagnetic materials
Ferromagnetic resonance
Illumination
Inhomogeneity
Magnetic anisotropy
Magnons
Materials science
Natural lighting
Photoelectrons
Spintronics
Sunlight
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Summary:Spin waves are considered to be an alternative carrier with great promise for information sensing. The feasible excitation and low‐power manipulation of spin waves still remain a challenge. In this regard, natural light enablings spin‐wave tunability in Co 60 Al 40 ‐alloyed film is investigated. A reversible shift of the critical angle (from 81° in the dark to 83° under illumination) of the body spin‐wave is achieved successfully Meanwhile, an eye‐catching shift (817 Oe) of the ferromagnetic resonance (FMR) field is obtained optically, leading to changes in magnetic anisotropy. Based on the modified Puszkarski's surface inhomogeneity model, the control of spin‐wave resonance (SWR) by sunlight can be understood by an effective photoelectron‐doping‐induced change of the surface magnetic anisotropy. Furthermore, the body spin wave is modulated stably with natural light illumination, confirming a non‐volatile, reversible switching behavior. This work has both practical and theoretical importance for developing future sunlight‐tunable magnonics/spintronics devices.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.202303810