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

doi:10.1021/nl404412w

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 journal › Article › peer-review

19 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 language	English (US)
Pages (from-to)	1362-1368
Number of pages	7
Journal	Nano Letters
Volume	14
Issue number	3
DOIs	https://doi.org/10.1021/nl404412w
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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10.1021/nl404412w

Cite this

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title = "Structural and magnetic evolution of bimetallic MnAu clusters driven by asymmetric atomic migration",

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 {\AA} 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.",

keywords = "Bimetallic nanoparticles, Ostwald ripening, annealing, phase transformation, structure-property correlation, structure/composition/morphology evolution",

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

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doi = "10.1021/nl404412w",

language = "English (US)",

volume = "14",

pages = "1362--1368",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Structural and magnetic evolution of bimetallic MnAu clusters driven by asymmetric atomic migration

AU - Wei, Xiaohui

AU - Zhou, Rulong

AU - Lefebvre, Williams

AU - He, Kai

AU - Le Roy, Damien

AU - Skomski, Ralph

AU - Li, Xingzhong

AU - Shield, Jeffrey E.

AU - Kramer, Matthew J.

AU - Chen, Shuang

AU - Zeng, Xiao Cheng

AU - Sellmyer, David J.

PY - 2014/3/12

Y1 - 2014/3/12

N2 - 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.

AB - 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.

KW - Bimetallic nanoparticles

KW - Ostwald ripening

KW - annealing

KW - phase transformation

KW - structure-property correlation

KW - structure/composition/morphology evolution

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DO - 10.1021/nl404412w

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JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 3

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

Abstract

Keywords

ASJC Scopus subject areas

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