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説明:

Sb2Te3 is a layered material with the properties of both a topological insulator and a phase-change material. In this study, to investigate the relationship between the spin current-to-charge current conversion efficiency of Sb2Te3 and its phase, we fabricated Sb2Te3/CoFeB bilayers with varying Sb2Te3 thicknesses. The electromotive force induced at both ends of the bilayer was measured as a result of the scattering of the spin current injected into Sb2Te3 by spin pumping due to ferromagnetic resonance, the so-called inverse spin Hall effect (ISHE). Two different Sb2Te3 phases—crystalline and amorphous—were prepared, and the phase dependence of the ISHE was investigated. The ISHE of the crystalline Sb2Te3 film exhibited a strong dependence on thickness, whereas the amorphous phase showed only a minor variation with thickness. These findings contribute to the development of novel devices that exploit both the charge and spin degrees of freedom in topological insulator-based spintronic applications.

権利情報:

• In Copyright
  

キーワード: Sb2Te3, phase change material, spin hall effect

刊行年月日: 2025-08-01

出版者: AIP Publishing

掲載誌:

• APL Materials (ISSN: 2166532X) vol. 13 issue. 8 081109

研究助成金:

• Japan Society for the Promotion of Science 22H01151
• Japan Society for the Promotion of Science 23K04576
• Precursory Research for Embryonic Science and Technology JPMJPR23H6

原稿種別: 査読前原稿 (Author's original)

MDR DOI: https://doi.org/10.48505/nims.5893

公開URL: https://doi.org/10.1063/5.0276308

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更新時刻: 2025-11-12 11:44:25 +0900

MDRでの公開時刻: 2025-11-12 16:23:58 +0900