Reconfigurable nonreciprocal excitation of propagating exchange spin waves in perpendicularly magnetized yttrium iron garnet thin films

Wang, Hanchen1,2,3; Wang, Jinlong1; Chen, Shuyao4; Chen, Peng5; Legrand, William3; Zhang, Yu5; Sheng, Lutong1; Yuan, Rundong1; Chen, Jilei2,6; Yu, Guoqiang5; Wan, Caihua5; Han, Xiufeng5; Liu, Tao4; Ansermet, Jean-Philippe6,7; Yu, Haiming1,2

2023-10-03

10.1103/PhysRevB.108.134403

PHYSICAL REVIEW B   Impact Factor & Quartile

2469-9950

2469-9969

We report the nonreciprocal excitation of propagating forward volume exchange spin waves in yttrium iron garnet (YIG) thin film with perpendicular anisotropy by bringing the in-plane magnetization of Co20Fe60B20 (CoFeB) nanowires to resonance. All-electric spin-wave spectroscopy is used to measure propagating spin waves in YIG subjected to out-of-plane external magnetic fields. The nonreciprocity can be reconfigured by inverting the in-plane magnetization of the CoFeB nanowires. The exchange spin waves achieved in the experiments have wavelengths down to about 150 nm and fast group velocities of up to 1.6 km/s, which can be accounted for with the dipole-exchange spin-wave dispersion of the forward volume mode. Micromagnetic simulations reproduce these experimental features, verifying that the key physics behind this nonreciprocity is the intrinsically chiral dynamic stray fields generated by the resonating CoFeB magnetization. Our results provide key insights into advanced and high-frequency magnonic devices.

SCI

English

NI Journal Papers

Corresponding

National Key Research and Development Program of China[2022YFA1402801] ; NSF China["12074026","U1801661"] ; China Scholarship Council (CSC)[202206020091] ; Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology[SIQSE202007] ; ETH Zurich Postdoctoral Fellowship[21-1 FEL-48]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001087572300002

AMER PHYSICAL SOC

PHYSICS

Web of Science

1.Beihang Univ, Fert Beijing Inst, Sch Integrated Circuit Sci & Engn, MIIT Key Lab Spintron, Beijing 100191, Peoples R China
2.Int Quantum Acad, Shenzhen 518055, Peoples R China
3.ETH, Dept Mat, CH-8093 Zurich, Switzerland
4.Univ Elect Sci & Technol China, Natl Engn Res Ctr Electromagnet Radiat Control Mat, Chengdu 610054, Peoples R China
5.Univ Chinese Acad Sci, Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China
6.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
7.Ecole Polytech Fed Lausanne EPFL, Inst Phys, CH-1015 Lausanne, Switzerland

Wang, Hanchen,Wang, Jinlong,Chen, Shuyao,et al. Reconfigurable nonreciprocal excitation of propagating exchange spin waves in perpendicularly magnetized yttrium iron garnet thin films[J]. PHYSICAL REVIEW B,2023,108(13).

Wang, Hanchen.,Wang, Jinlong.,Chen, Shuyao.,Chen, Peng.,Legrand, William.,...&Yu, Haiming.(2023).Reconfigurable nonreciprocal excitation of propagating exchange spin waves in perpendicularly magnetized yttrium iron garnet thin films.PHYSICAL REVIEW B,108(13).

Wang, Hanchen,et al."Reconfigurable nonreciprocal excitation of propagating exchange spin waves in perpendicularly magnetized yttrium iron garnet thin films".PHYSICAL REVIEW B 108.13(2023).