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

Author:

Zhao Meng1,Zhao Yifan1,Li Yaojin1,Dong Guohua1,He Zhexi1,Du Yujing1,Jiang Yuxuan1,Wu Shaoyuan2,Wang Chenying3,Zhao Libo3,Jiang Zhuangde3,Liu Ming1ORCID,Zhou Ziyao1

Affiliation:

1. Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education & International Center for Dielectric Research School of Electronic Science and Engineering State Key Laboratory for Manufacturing Systems Engineering The International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology Xi'an Jiaotong University Xi'an 710049 China

2. Jiangsu Key Laboratory of Phylogenomics & Comparative Genomics Jiangsu International Joint Center of Genomics School of Life Sciences Jiangsu Normal University Xuzhou Jiangsu 221116 China

3. State Key Laboratory for Manufacturing Systems Engineering School of Mechanical Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies Xi'an, Jiaotong University Xi'an 710049 China

Abstract

AbstractSpin 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 Co60Al40‐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.

Funder

National Basic Research Program of China

National Natural Science Foundation of China

Higher Education Discipline Innovation Project

China Postdoctoral Science Foundation

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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