2026-05-28 東北大学
図1. 発明した二次元マグノニック結晶を用いたＺ型スピン波導波路
＜関連情報＞
- https://www.tohoku.ac.jp/japanese/2026/05/press20260528-02-Z.html
- https://journals.aps.org/prapplied/abstract/10.1103/m64z-lh2m
イットリウム鉄ガーネットのマグノニック結晶における完全なバンドギャップと銅の穴アレイを用いたZ字型導波路 Z-shaped waveguides using complete band gaps in magnonic crystals of yttrium iron garnet and a copper hole array
Kanta Mori, Takumi Koguchi, Toshiaki Watanabe, Hibiki Miyashita, Dan Shabaev, Dirk Grundler, Mitsuteru Inoue, Kazushi Ishiyama, and Taichi Goto
Physical Review Applied Published: 27 May, 2026
DOI: https://doi.org/10.1103/m64z-lh2m
Abstract
Guiding spin wave (SW) signals around turns in integrated magnonic circuits remains a challenge. Here, we calculated efficient SW transmission through Z-shaped turns of 120° using low-loss magnonic crystal (MC) waveguides comprising yttrium iron garnet (YIG) and a Cu hole array. The MCs were optimized using a finite integration technique, showing a complete magnonic band gap with a width of 15.1 MHz at a center frequency of 1.811 GHz. The MC waveguide showed 5.7 × 103 times stronger SW propagation than ridge-type waveguides by avoiding SW depression caused by inhomogeneous internal magnetic field distributions in the YIG film. The effect of the bending radius on the SW propagation was evaluated through simulations. The proposed MC waveguide plays a vital role in SW waveguide integration by maintaining homogeneous magnetic field distributions throughout the unprocessed YIG film.
