Long-distance propagation of short-wavelength spin waves

Chuanpu Liu, Jilei Chen, Tao Liu, Florian Heimbach, Haiming Yu (), Yang Xiao, Junfeng Hu, Mengchao Liu, Houchen Chang, Tobias Stueckler, Sa Tu, Youguang Zhang, Yan Zhang, Peng Gao, Zhimin Liao, Dapeng Yu, Ke Xia, Na Lei, Weisheng Zhao and Mingzhong Wu ()
Additional contact information
Chuanpu Liu: Beihang University
Jilei Chen: Beihang University
Tao Liu: Colorado State University
Florian Heimbach: Beihang University
Haiming Yu: Beihang University
Yang Xiao: Nanjing University of Aeronautics and Astronautics
Junfeng Hu: Beihang University
Mengchao Liu: Peking University
Houchen Chang: Colorado State University
Tobias Stueckler: Beihang University
Sa Tu: Beihang University
Youguang Zhang: Beihang University
Yan Zhang: Beihang University
Peng Gao: Peking University
Zhimin Liao: Peking University
Dapeng Yu: Peking University
Ke Xia: Beijing Normal University
Na Lei: Beihang University
Weisheng Zhao: Beihang University
Mingzhong Wu: Colorado State University

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract Recent years have witnessed a rapidly growing interest in exploring the use of spin waves for information transmission and computation toward establishing a spin-wave-based technology that is not only significantly more energy efficient than the CMOS technology, but may also cause a major departure from the von-Neumann architecture by enabling memory-in-logic and logic-in-memory architectures. A major bottleneck of advancing this technology is the excitation of spin waves with short wavelengths, which is a must because the wavelength dictates device scalability. Here, we report the discovery of an approach for the excitation of nm-wavelength spin waves. The demonstration uses ferromagnetic nanowires grown on a 20-nm-thick Y3Fe5O12 film strip. The propagation of spin waves with a wavelength down to 50 nm over a distance of 60,000 nm is measured. The measurements yield a spin-wave group velocity as high as 2600 m s−1, which is faster than both domain wall and skyrmion motions.

Date: 2018
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DOI: 10.1038/s41467-018-03199-8

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