Determination of lattice distortion in nanoparticles on strained substrates using molecular dynamics

Magnetoelastic anisotropies arising from substrate induced strains provide a way to optimize the magnetic properties of nanoparticles. A possible way to induce such anisotropies is the deposition of clusters on substrates which are deformed or otherwise expanded subsequently. However, the experiment...

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Bibliographic Details
Published in:Journal of physics. Conference series 2009-01, Vol.144 (1), p.012010
Main Authors: Zhou, J, Saranu, S, Herr, U
Format: Article
Language:English
Subjects:
Copper
Deformation
Deposition
Flat surfaces
Kinetic energy
Low temperature
Magnetic properties
Molecular dynamics
Nanoparticles
Physics
Substrates
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Summary:Magnetoelastic anisotropies arising from substrate induced strains provide a way to optimize the magnetic properties of nanoparticles. A possible way to induce such anisotropies is the deposition of clusters on substrates which are deformed or otherwise expanded subsequently. However, the experimental determination of strain in nanoparticles is complicated by the low diffraction intensities. We used the molecular dynamics simulation technique to determine the deformation of Co particles deposited on Cu substrates. Co particles of 4.5 nm diameter with fcc structure were built using a Wulff construction and subsequently deposited with their (111) or (100) facets on (100) oriented Cu substrates with a kinetic energy of 10meV/atom at temperatures of 10 K or 300 K. After the deposition, the lattice parameter of the Cu substrate has been increased continuously. It is found that significant strain in the Co particles can only be obtained in the case of (100) facets on (100) surfaces at low temperatures.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/144/1/012010