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Description:

Spacer layers critically influence nanoscale interfacial reactions, strain transfer, and microstructural evolution in FePt based multilayer films. Here, FePt−C/X−C/FePt−C trilayer systems (X = Ir, Pt, Ag) are employed to examine how spacer material governs thermodynamic stability and interfacial chemistry. Distinct spacer-dependent behaviors are identified. Ir promotes strong wetting, which results in network-like FePt morphologies, Ag is immiscible with FePt, which leads to granular isolation but a loss of epitaxial continuity, and Pt undergoes interfacial interdiffusion, which forms an L12-ordered reaction phase at the spacer position.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: ordered alloy, Multilayer, Interfacial reaction, FePt, Phase-field simulation

Date published: 2026-05-08

Publisher: American Chemical Society (ACS)

Journal:

• ACS Applied Nano Materials (ISSN: 25740970) vol. 9 issue. 18 p. 8049-8059

Funding:

• Seagate Technology 00109410.0
• Ministry of Education, Culture, Sports, Science and Technology JPMXP1122715503
• Japan Science and Technology Corporation JPMJC22C3

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6275

First published URL: https://doi.org/10.1021/acsanm.6c00330

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Updated at: 2026-05-11 14:32:53 +0900

Published on MDR: 2026-05-11 16:25:06 +0900