Unidirectional spin waves

The limits of conventional electronic systems will soon be reached, and scientists are on the lookout for new solutions, one of which would entail using spin waves to create logic architectures that are more efficient than today’s CMOS systems. But to work, the spin waves have to be unidirectional, which is a challenge!

Researchers at INAC used simulation to demonstrate that the Dzyaloshinskii-Moriya interaction, an antisymmetric phenomenon that occurs at the metallic multilayer interfaces of thin films, affects spin wave sources by modifying their emission frequency according to their direction. In other words, an excitation source with spatial periodicity can emit unidirectional spin waves. The model used by the researchers can also help determine source frequency and wavelength.

Contact: gilles.gaudin@cea.fr

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