Abstract
The nanoscale structural, compositional, and magnetic properties are examined for annealed MnAu nanoclusters. The MnAu clusters order into the L10 structure, and monotonic size-dependences develop for the composition and lattice parameters, which are well reproduced by our density functional theory calculations. Simultaneously, Mn diffusion forms 5 Å nanoshells on larger clusters inducing significant magnetization in an otherwise antiferromagnetic system. The differing atomic mobilities yield new cluster nanostructures that can be employed generally to create novel physical properties.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1362-1368 |
| Number of pages | 7 |
| Journal | Nano Letters |
| Volume | 14 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 12 2014 |
Keywords
- Bimetallic nanoparticles
- Ostwald ripening
- annealing
- phase transformation
- structure-property correlation
- structure/composition/morphology evolution
ASJC Scopus subject areas
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering
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Wei, X., Zhou, R., Lefebvre, W., He, K., Le Roy, D., Skomski, R., Li, X., Shield, J. E., Kramer, M. J., Chen, S., Zeng, X. C., & Sellmyer, D. J. (2014). Structural and magnetic evolution of bimetallic MnAu clusters driven by asymmetric atomic migration. Nano Letters, 14(3), 1362-1368. https://doi.org/10.1021/nl404412w