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Updated: May 3, 2026
08:55
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
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Structural and magnetic evolution of bimetallic MnAu clusters driven by asymmetric atomic migration
Xiaohui Wei1, Rulong Zhou, Williams Lefebvre
1Department of Physics and Astronomy, University of Nebraska , Lincoln, Nebraska 68588, United States.
Nano Letters
|February 13, 2014
Summary
Annealed manganese-gold (MnAu) nanoclusters form an L1(0) structure with size-dependent properties. Manganese diffusion creates nanoshells, inducing magnetization in these magnetic nanoclusters.
Area of Science:
- Materials Science
- Nanotechnology
- Condensed Matter Physics
Background:
- Understanding nanoscale properties is crucial for developing advanced materials.
- Manganese-gold (MnAu) alloys are of interest for their magnetic and structural characteristics.
Purpose of the Study:
- To investigate the nanoscale structural, compositional, and magnetic properties of annealed MnAu nanoclusters.
- To explore the influence of annealing and Mn diffusion on MnAu nanocluster properties.
Main Methods:
- Experimental characterization of annealed MnAu nanoclusters.
- Density functional theory (DFT) calculations to model structural and compositional dependencies.
Main Results:
- MnAu nanoclusters exhibit the L1(0) ordered structure.
- Monotonic size-dependences were observed for composition and lattice parameters, consistent with DFT calculations.
- Manganese diffusion forms 5 Å nanoshells on larger clusters, inducing significant magnetization in an otherwise antiferromagnetic system.
Conclusions:
- Atomic mobilities in MnAu nanoclusters lead to novel nanostructures.
- These nanostructures can be utilized to engineer unique physical properties for advanced applications.
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