Anomalous enhancement in interfacial perpendicular magnetic anisotropy through uphill diffusion

We observed interfacial chemical sharpening due to uphill diffusion in post annealed ultrathin multilayer stack of Co and Pt, which leads to enhanced interfacial perpendicular magnetic anisotropy (PMA). This is surprising as these elements are considered as perfectly miscible. This chemical sharpeni...

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Detalles Bibliográficos
Autores principales: Das, Tanmay, Kulkarni, Prabhanjan D., Purandare, S. C., Barshilia, Harish C., Bhattacharyya, Somnath, Chowdhury, Prasanta
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4060506/
https://www.ncbi.nlm.nih.gov/pubmed/24937637
http://dx.doi.org/10.1038/srep05328
Descripción
Sumario:We observed interfacial chemical sharpening due to uphill diffusion in post annealed ultrathin multilayer stack of Co and Pt, which leads to enhanced interfacial perpendicular magnetic anisotropy (PMA). This is surprising as these elements are considered as perfectly miscible. This chemical sharpening was confirmed through quantitative energy dispersive x-ray (EDX) spectroscopy and intensity distribution of images taken on high angle annular dark field (HAADF) detector in Scanning Transmission Electron Microscopic (STEM) mode. This observation demonstrates an evidence of miscibility gap in ultrathin coherent Co/Pt multilayer stacks.

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