Magnetic Snell's law and spin-wave fiber with Dzyaloshinskii-Moriya interaction

Weichao Yu, Jin Lan, Ruqian Wu, Jiang Xiao

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

Spin waves are collective excitations propagating in the magnetic medium with ordered magnetizations. Magnonics, utilizing the spin wave (magnon) as an information carrier, is a promising candidate for low-dissipation computation and communication technologies. We discover that, due to the Dzyaloshinskii-Moriya interaction, the scattering behavior of the spin wave at a magnetic domain wall follows a generalized Snell's law, where two magnetic domains work as two different mediums. Similar to optical total reflection that occurs at water-air interfaces, spin waves may experience total reflection at the magnetic domain walls when their incident angle is larger than a critical value. We design a spin-wave fiber using a magnetic domain structure with two domain walls, and demonstrate that such a spin-wave fiber can transmit spin waves over long distances by total internal reflections, in analogy to an optical fiber.

Original languageEnglish
Article number140410
JournalPhysical Review B
Volume94
Issue number14
DOIs
Publication statusPublished - 2016 Oct 11
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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