Mode-sensitive magnetoelastic coupling in phononic-crystal magnomechanics
| Autor: | Hatanaka, D., Yamaguchi, H. |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | APL Materials 9, 071110 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/5.0052150 |
| Popis: | Acoustically driven spin-wave resonance in a phononic crystal cavity is numerically investigated. The designed cavity enables confinement of gigahertz vibrations in a wavelength-scale point-defect structure and sustains a variety of resonance modes. Inhomogeneous strain distributions in the modes modify the magnetostrictive coupling and the spin-wave excitation susceptible to an external field orientation. In particular, a monopole-like mode in the cavity having a near-symmetrical pattern shows a subwavelength-scale mode volume and can provide a versatile acoustic excitation scheme independent on field-angle variation. Thus, the phononic-crystal platform offers an alternative approach to acoustically control the spin-wave dynamics with ultrasmall and inhomogeneous mode structures, which will be a key technology to integrate and operate large-scale magnomechanical circuits. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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