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タイトル: | Switchable giant nonreciprocal frequency shift of propagating spin waves in synthetic antiferromagnets |
著者: | Ishibashi, Mio Shiota, Yoichi https://orcid.org/0000-0003-1199-8438 (unconfirmed) Li, Tian Funada, Shinsaku Moriyama, Takahiro https://orcid.org/0000-0001-7071-0823 (unconfirmed) Ono, Teruo |
著者名の別形: | 石橋, 未央 塩田, 陽一 李, 恬 船田, 晋作 森山, 貴広 小野, 輝男 |
発行日: | 22-Apr-2020 |
出版者: | American Association for the Advancement of Science (AAAS) |
誌名: | Science Advances |
巻: | 6 |
号: | 17 |
論文番号: | eaaz6931 |
抄録: | The nonreciprocity of propagating spin waves, i.e., the difference in amplitude and/or frequency depending on the propagation direction, is essential for the realization of spin wave–based logic circuits. However, the nonreciprocal frequency shifts demonstrated so far are not large enough for applications because they originate from interfacial effects. In addition, switching of the spin wave nonreciprocity in the electrical way remains a challenging issue. Here, we show a switchable giant nonreciprocal frequency shift of propagating spin waves in interlayer exchange–coupled synthetic antiferromagnets. The observed frequency shift is attributed to large asymmetric spin wave dispersion caused by a mutual dipolar interaction between two magnetic layers. Furthermore, we find that the sign of the frequency shift depends on relative configuration of two magnetizations, based on which we demonstrate an electrical switching of the nonreciprocity. Our findings provide a route for switchable and highly nonreciprocal spin wave–based applications. |
記述: | スピン波の巨大な非相反性の制御に成功 --人工反強磁性体を用いたスピン波デバイスの実現に向けて--. 京都大学プレスリリース. 2020-04-30. |
著作権等: | © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). This is an open-access article distributed under the terms of the Creative Commons Attribution license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
URI: | http://hdl.handle.net/2433/250670 |
DOI(出版社版): | 10.1126/sciadv.aaz6931 |
PubMed ID: | 32494648 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2020-04-30 |
出現コレクション: | 学術雑誌掲載論文等 |
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