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- W2022166844 abstract "We have calculated surface energies and surface magnetic order of various low-indexed surfaces of monoatomic Fe, Co, and Pt, and binary, ordered FePt, CoPt, and MnPt using density-functional theory. Our results for the binary systems indicate that elemental, Pt-covered surfaces are preferred over Fe and Co covered and mixed surfaces of the same orientation. The lowest energy orientation for mixed surfaces is the highly coordinated (111) surface. We find Pt-covered (111) surfaces, which can be realized in the $text{L}{1}_{1}$ structure only, to be lower in energy by about 400 meV/atom compared to the mixed $text{L}{1}_{0}$ (111) surface. We conclude that in small nanoparticles this low surface energy can stabilize the $text{L}{1}_{1}$ structure, which is suppressed in bulk alloys. From the interplay of surface and bulk energies, equilibrium shapes of single-crystalline ordered nanoparticles and crossover sizes between the different orderings can be estimated." @default.
- W2022166844 created "2016-06-24" @default.
- W2022166844 creator A5013871137 @default.
- W2022166844 creator A5023155578 @default.
- W2022166844 creator A5043659159 @default.
- W2022166844 creator A5069719946 @default.
- W2022166844 date "2009-12-29" @default.
- W2022166844 modified "2023-09-25" @default.
- W2022166844 title "Surface energies of stoichiometric FePt and CoPt alloys and their implications for nanoparticle morphologies" @default.
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