Strong magnon-magnon coupling between ferromagnetic resonances in Co90Zr10/Ta/Fe20Ni80 multilayers

被引：5

作者：

Ma, Keke ^{[1
]}

Li, Chaozhong ^{[1
]}

Hao, Zhenhui ^{[1
]}

Ong, C. K. ^{[1
,2
]}

Chai, Guozhi ^{[1
]}

机构：

[1] Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Lanzhou 730000, Peoples R China

[2] Xiamen Univ Malaysia, Dept Phys, Jalan Sunsuria, Sepang 43900, Selangor, Malaysia

来源：

PHYSICAL REVIEW B | 2023年 / 108卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Anisotropy - Cobalt alloys - Ferromagnetic materials - Ferromagnetism - Ground state - Multilayers - Tantalum;

D O I：

10.1103/PhysRevB.108.094422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the magnon-magnon coupling between the ferromagnetic resonances (FMRs) from different ferromagnetic layers in Co90Zr10(100 nm)/Ta/Fe20Ni80(100 nm) multilayers by using broadband ferromagnetic resonance. The strong coupling between two FMRs through interlayer exchange interaction is realized due to the fact that the thicknesses of both the ferromagnetic layers far exceed the corresponding exchange length. Moreover, we find that the coupling strength can be tuned by changing the thickness of the nonmagnetic Ta layer, revealing inversely proportional relationship between the coupling strength and the thickness of the nonmagnetic Ta layer. The coupling field and coupling efficiency can be regulated by varying the anisotropy of the ferromagnetic layers via oblique deposition. Furthermore, the coupling between FMR and perpendicular standing spin waves can also be achieved with suitable anisotropy and external magnetic field. These observations demonstrate that the ground state magnonic system provides a simple ideal platform for strong magnon-magnon coupling.

引用

页数：6