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| Hauptverfasser: | , , , , , , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Online-Zugang: | https://arxiv.org/abs/2505.19370 |
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| _version_ | 1866913858339209216 |
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| author | de Oliveira, E. R. Cardozo Xiang, C. Borrazás, C. Sandeep, S. Gómez, J. E. Mansilla, M. Vásquez Findling, N. Largeau, L. Lanzillotti-Kimura, N. D. Granada, M. |
| author_facet | de Oliveira, E. R. Cardozo Xiang, C. Borrazás, C. Sandeep, S. Gómez, J. E. Mansilla, M. Vásquez Findling, N. Largeau, L. Lanzillotti-Kimura, N. D. Granada, M. |
| contents | Superlattices presenting a spatial modulation of the elastic properties appear as a main tool to reach the THz regime in nanoacoustic devices. The exploration of alternative materials with multifunctional properties remains a fertile domain of research. In this work, we study the structural, magnetic, and acoustic characteristics of nanometric superlattices made of Pt/Co.
The samples present a well defined periodicity, as determined by X-ray reflectometry, whereas scanning transmission electron microscopy with local compositional analysis reveals that the superlattices present a modulation in composition instead of sharp interfaces. The policrystalline nature of the superlattices is evidenced both by X ray diffraction and transmission electron microscopy. Magnetization measurements show a perpendicular magnetic anisotropy for the higher Co concentrations. Picosecond acoustic experiments evidence that the studied samples support short-lived acoustic modes up to 900 GHz, and up to 7 acoustic echoes at lower frequencies.These are promising results for the development of magnetoacoustic devices working at ultrahigh frequencies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_19370 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Structural, magnetic, and nanoacoustic characterization of Co/Pt superlattices de Oliveira, E. R. Cardozo Xiang, C. Borrazás, C. Sandeep, S. Gómez, J. E. Mansilla, M. Vásquez Findling, N. Largeau, L. Lanzillotti-Kimura, N. D. Granada, M. Materials Science Superlattices presenting a spatial modulation of the elastic properties appear as a main tool to reach the THz regime in nanoacoustic devices. The exploration of alternative materials with multifunctional properties remains a fertile domain of research. In this work, we study the structural, magnetic, and acoustic characteristics of nanometric superlattices made of Pt/Co. The samples present a well defined periodicity, as determined by X-ray reflectometry, whereas scanning transmission electron microscopy with local compositional analysis reveals that the superlattices present a modulation in composition instead of sharp interfaces. The policrystalline nature of the superlattices is evidenced both by X ray diffraction and transmission electron microscopy. Magnetization measurements show a perpendicular magnetic anisotropy for the higher Co concentrations. Picosecond acoustic experiments evidence that the studied samples support short-lived acoustic modes up to 900 GHz, and up to 7 acoustic echoes at lower frequencies.These are promising results for the development of magnetoacoustic devices working at ultrahigh frequencies. |
| title | Structural, magnetic, and nanoacoustic characterization of Co/Pt superlattices |
| topic | Materials Science |
| url | https://arxiv.org/abs/2505.19370 |