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Structural and Magnetic Evolution of Bimetallic MnAu Clusters Driven by Asymmetric Atomic Migration

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    Structural and Magnetic Evolution of Bimetallic MnAu Clusters Driven by Asymmetric Atomic Migration
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    † Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, United States
    ‡ Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, United States
    § UR, Groupe de Physique des Matériaux−GPM, UMR CNRS 6634, 76801 Saint Etienne du Rouvray, France
    ∥ Department of Mechanical and Materials Engineering, University of Nebraska, Lincoln, Nebraska 68588, United States
    ⊥ Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, United States
    # Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
    ∇ Division of Materials Science and Engineering, Ames Lab, Ames, Iowa 50011-3020, United States
    ○ School of Science and Engineering of Materials, Hefei University of Technology, Hefei, Anhui 230009, China
    *(D.J.S.) E-mail: [email protected]
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    Nano Letters

    Cite this: Nano Lett. 2014, 14, 3, 1362–1368
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    https://doi.org/10.1021/nl404412w
    Published February 11, 2014
    Copyright © 2014 American Chemical Society
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    Abstract

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    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.

    Copyright © 2014 American Chemical Society

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    Materials and methods, Figures S1–S5. This material is available free of charge via the Internet at http://pubs.acs.org.

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    Nano Letters

    Cite this: Nano Lett. 2014, 14, 3, 1362–1368
    Click to copy citationCitation copied!
    https://doi.org/10.1021/nl404412w
    Published February 11, 2014
    Copyright © 2014 American Chemical Society
    Request reuse permissions

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