Demonstration of a robust magnonic spin wave interferometer

Naoki Kanazawa, Taichi Goto, Koji Sekiguchi, Alexander B. Granovsky, Caroline A. Ross, Hiroyuki Takagi, Yuichi Nakamura, Mitsuteru Inoue

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Magnonics is an emerging field dealing with ultralow power consumption logic circuits, in which the flow of spin waves, rather than electric charges, transmits and processes information. Waves, including spin waves, excel at encoding information via their phase using interference. This enables a number of inputs to be processed in one device, which offers the promise of multi-input multi-output logic gates. To realize such an integrated device, it is essential to demonstrate spin wave interferometers using spatially isotropic spin waves with high operational stability. However, spin wave reflection at the waveguide edge has previously limited the stability of interfering waves, precluding the use of isotropic spin waves, i.e., forward volume waves. Here, a spin wave absorber is demonstrated comprising a yttrium iron garnet waveguide partially covered by gold. This device is shown experimentally to be a robust spin wave interferometer using the forward volume mode, with a large ON/OFF isolation value of 13.7 dB even in magnetic fields over 30 Oe.

Original languageEnglish
Article number30268
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 2016 Jul 22

ASJC Scopus subject areas

  • General

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    Kanazawa, N., Goto, T., Sekiguchi, K., Granovsky, A. B., Ross, C. A., Takagi, H., Nakamura, Y., & Inoue, M. (2016). Demonstration of a robust magnonic spin wave interferometer. Scientific Reports, 6, [30268]. https://doi.org/10.1038/srep30268