Structural and magnetic evolution of bimetallic MnAu clusters driven by asymmetric atomic migration

Xiaohui Wei, Rulong Zhou, Williams Lefebvre, Kai He, Damien Le Roy, Ralph Skomski, Xingzhong Li, Jeffrey E. Shield, Matthew J. Kramer, Shuang Chen, Xiao Cheng Zeng, David J. Sellmyer

Research output: Contribution to journalArticle

17 Scopus citations

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 languageEnglish (US)
Pages (from-to)1362-1368
Number of pages7
JournalNano Letters
Volume14
Issue number3
DOIs
StatePublished - 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