| Autor: |
Hee-Sung Han, Sooseok Lee, Min-Seung Jung, Namkyu Kim, Dae-Han Jung, Myeonghwan Kang, Hye-Jin Ok, Weilun Chao, Young-Sang Yu, Jung-Il Hong, Mi-Young Im, Ki‐Suk Lee |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
NPG Asia Materials, vol 14, iss 1 |
| Popis: |
Harmonic oscillation of spin structures is a physical phenomenon that offers great potential for applications in nanotechnologies such as nano-oscillators and bio-inspired computing. The effective tuning of oscillations over wide frequency ranges within a single ferromagnetic nanoelement is a prerequisite to realize oscillation-based nanodevices, but it has not been addressed experimentally or theoretically. Here, utilizing a vortex core structure, one of spin structures, we report a drastic change of oscillation modes over the frequency range from MHz to sub-GHz in a 100 nm-thick permalloy circular disk. Oscillation mode was found to considerably depend on the shape and dimension of the vortex core structure and various oscillation modes over a wide range of frequencies appeared with dimensional change in the vortex core structure. This work demonstrates that oscillation modes of the vortex core structure can be effectively tuned and opens a way to apply spin structures to oscillation-based technology. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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