4.6 Review

Unidirectional spin-wave propagation and devices

Journal

JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 55, Issue 12, Pages -

Publisher

IOP Publishing Ltd
DOI: 10.1088/1361-6463/ac31f4

Keywords

magnonics; spin waves; unidirectionality

Funding

  1. NSF [12074026, 12104208, U1801661]
  2. 111 Talent Program [B16001]
  3. National Key Research and Development Program of China [2016YFA0300802, 2017YFA0206200]
  4. European Metrology Programme for Innovation and Research (EMPIR) [17FUN08 TOPS]

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This article discusses the application of unidirectional spin waves in next-generation logic devices, covering methods for emitting and measuring unidirectional spin waves, as well as magnonic logic devices based on such waves.
Unidirectional information transport plays a key role in optics, microwave technology, electronic logic circuits and devices. Spin waves (SWs) are considered to be a promising candidate for the next-generation logic devices, which have many advantages such as low-energydissipation and compatibility with radio-frequency-based electronic devices. Unidirectional SWs have been demonstrated in magnetic thin films theoretically and experimentally, offering a great opportunity to realize unidirectional transport of spin information. In this article, we review several methods for emitting and measuring unidirectional SWs, such as using the nonreciprocity provided by magnetostatic surface SWs and interfacial Dzyaloshinskii-Moriya interactions. Unidirectional SWs can also be excited by magnetic nanowire arrays as well as spatially defined spin textures. Finally, we review some magnonic logic devices based on unidirectional SWs, such as spin-wave diodes.

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