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説明:

We investigated the thickness-dependent structural evolution of Cu/FeCo(100) thin films grown by molecular beam epitaxy (MBE). At the initial stage of growth, Cu adopted a body-centered cubic (bcc) structure templated by the underlying FeCo substrate. Once the Cu thickness exceeded approximately 3 nm, a structural transformation into the face-centered cubic (fcc) phase was observed. The MBE-grown films exhibited interfacial dislocations and developed a disordered surface in the thickness range of 3-5 nm. Although metastable ultrathin bcc-Cu films on FeCo(100) grown by MBE are less stable than sputtered multilayers, MBE offers a unique advantage: it enables in-situ advanced characterization such as angle-resolved photoemission spectroscopy (ARPES) in the ultrathin regime around 1 nm. This capability is essential for designing high-performance devices and probing interface-driven electronic phenomena.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Thin film, Copper, Nanostructure, Molecular beam epitaxy

刊行年月日: 2026-02-26

出版者: Surface Science Society Japan

掲載誌:

• e-Journal of Surface Science and Nanotechnology (ISSN: 13480391) vol. 24 issue. 1 p. 21-25 2026-004

研究助成金:

• Japan Science and Technology Agency JPMJCR21O1 (CREST)
• Japan Science and Technology Agency JPMJCR21O4 (CREST)
• Japan Science and Technology Agency JPMJPR17NB (PRESTO)
• Japan Science and Technology Agency JPMJPR20T7 (PRESTO)
• Japan Society for the Promotion of Science 25K01628 (科研費)
• Japan Society for the Promotion of Science 24K01243 (科研費)
• Japan Society for the Promotion of Science 24K01352 (科研費)
• Japan Society for the Promotion of Science 21H01638 (科研費)
• Japan Society for the Promotion of Science 21H04696 (科研費)
• the Innovative Science and Technology Initiative for Security, ATLA JPJ004596 (防衛装備費)
• Advanced Research Infrastructure for Materials and Nanotechnology in Japan (ARIM), of MEXT JPMXP1225NM5366
• Advanced Research Infrastructure for Materials and Nanotechnology in Japan (ARIM), of MEXT JPMXP1224NM5290
• Japan Science and Technology Agency JPMJSP2151 (SPRING)
• Austrian Science Fund (FWF) doi:10.55776/ F8100

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1380/ejssnt.2026-004

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更新時刻: 2026-11-02 08:51:17 +0900

MDRでの公開時刻: 2026-11-02 10:32:56 +0900