Long-distance propagation of short-wavelength spin waves.

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.

SUBMITTER: Liu C 

PROVIDER: S-EPMC5821877 | biostudies-other | 2018 Feb

REPOSITORIES: biostudies-other