Large nonreciprocity of shear-horizontal surface acoustic waves induced by a magnetoelastic bilayer

被引：5

作者：

Huang, Mingxian ^{[1
]}

Liu, Yuanyuan ^{[1
]}

Hu, Wenbin ^{[1
]}

Wu, Yutong ^{[2
]}

Wang, Wen ^{[2
]}

He, Wei ^{[3
,4
]}

Zhang, Huaiwu ^{[1
]}

Bai, Feiming ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Elect Sci & Engn, Chengdu 610054, Peoples R China

[2] Chinese Acad Sci, Inst Acoust, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, State Key Lab Magnetism, Inst Phys, Beijing 100190, Peoples R China

[4] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

来源：

PHYSICAL REVIEW APPLIED | 2024年 / 21卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Acoustic surface wave devices - Acoustic waves - Copper compounds - Iron compounds - Lithium compounds - Nickel compounds - Niobium compounds - Shear flow - Spin waves - Tantalum compounds;

D O I：

10.1103/PhysRevApplied.21.014035

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report large nonreciprocity in the transmission of shear-horizontal surface acoustic waves (SHSAWs) on LiTaO3 substrate coated with a Fe-Co-Si-B/Ni-Fe-Cu magnetoelastic bilayer. The large difference in saturation magnetization of the two layers not only brings nonreciprocal spin waves (SWs), but also ensures the phonon-magnon (SAW-SW) coupling at relatively low wave numbers. It is found that the angle between the static magnetization and the spin-wave vector plays a significant role in determining the strength of magnetoelastic coupling and nonreciprocity, simultaneously. A large nonreciprocal transmission of SAWs about 30 dB (i.e., 60 dB/mm) is demonstrated at 2.33 GHz. In addition, the dispersion relation between coupled SHSAWs and nonreciprocal SWs is developed, which provide a good insight into the observed phenomena. Our results offer a convenient approach to implement nonreciprocal SAW isolators or circulators.

引用

页数：13

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