| アイテムタイプ |
会議発表用資料 / Presentation(1) |
| 公開日 |
2025-07-07 |
| タイトル |
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タイトル |
Unravelling the magnetization dynamics of L10-ordered FePt thin films with low damping and large perpendicular magnetic anisotropy |
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言語 |
ja |
| 言語 |
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言語 |
jpn |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6670 |
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資源タイプ |
conference poster |
| 著者 |
Ｂｅｎｔｌｅｙ Ｐｈｉｌｌｉｐ Ｄａｖｉｄ
佐々木 悠太
鈴木 一平
磯上 慎二
高橋 有紀子
首藤 浩文
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| 抄録 |
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内容記述 |
To bridge the gap between fifth- and sixth-generation wireless telecommunications, THz spintronics an emergent area of research, aims to utilize spintronic devices such as magnetic spin torque oscillators as a source of low powered THz emission. The realization of such devices using ferromagnetic metal thin films however requires magnetic materials with both large perpendicular magnetic anisotropy (PMA) and low Gilbert damping constants. In this poster presentation, we report on the development of L10-ordered FePt with an effective Gilbert damping constant as low as 0.033. Using time-resolved magneto-optical Kerr effect, we characterized the magnetization dynamics of continuous L10-ordered FePt grown on MgO and SrTiO3 substrates. By changing the substrate on which FePt is grown, the lattice mismatch and subsequent number of misfit dislocations at the interface and L10-ordering can be controlled. We found that fewer misfits and improved ordering in FePt lead to a reduced Gilbert damping constant due to reduced electron scattering but that FePt grown on SrTiO3 also shows robust perpendicular magnetic anisotropy. Importantly, these results demonstrate the ability to control the damping in FePt opening up the possibility of using this material in spintronicmaterials in the THz wave range. |
| 会議概要（会議名, 開催地, 会期, 主催者等） |
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内容記述 |
光・量子ビーム科学合同シンポジウム2025（OPTO2025） |
| 発表年月日 |
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日付 |
2025-06-25 |
