Wei X, Zhou R, Lefebvre W, He K, Le Roy D, Skomski R, Li X, Shield JE, Kramer MJ, Chen S, Zeng XC, Sellmyer DJ. Structural and magnetic evolution of bimetallic MnAu clusters driven by asymmetric atomic migration.
NANO LETTERS 2014;
14:1362-1368. [PMID:
24517293 DOI:
10.1021/nl404412w]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The nanoscale structural, compositional, and magnetic properties are examined for annealed MnAu nanoclusters. The MnAu clusters order into the L1(0) 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.
Collapse