Communications of the ACM
Faster Spin Waves May Enable Magnonic Computing Systems
Researchers say their work is another step towards magnon computing.
Credit: University of Vienna
Researchers looking for alternatives to current electronic computing technology are investigating the field of magnonics: instead of electron exchange, the waves generated in magnetic media could be used for transmitting information. Magnonics-based computing has been too slow to date, but a team of scientists have discovered that by increasing spin-wave intensity, the spin waves become shorter and faster — another step towards magnon computing.
The results are published in the journal Science Advances.
Co-author Andrii Chumak explains the discovery with a metaphor: "It is helpful to imagine the method with light. If you change the wavelength of light, its color changes. But if you change the intensity, only the luminosity changes. In this case, we found a way to change the color by changing the intensity of the spin waves. This phenomenon allowed us to excite much shorter and much better spin waves."
The current wavelength found with this system is about 200 nanometers. According to numerical simulations, it would be possible to excite even smaller wavelengths, but at this stage it is difficult to excite or measure these orders of magnitude.
From University of Vienna
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