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Thermal behavior of superparamagnetic cobalt nanodots explored by anisotropic magnetic molecular dynamics simulations
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10.1063/1.3677932
/content/aip/journal/jap/111/7/10.1063/1.3677932
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/7/10.1063/1.3677932
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Ea vs the nanodot size (number of atoms N at). Black line is the macrospin model. Green points are obtained from a monolayer hcp-Co simulations and single-axis anisotropy. Blue points are for a bilayer. Red points are the result of an ASD simulation of a bilayer hcp-Co with a pseudo-dipolar anisotropy only. Orange squares are obtained with MMD calculations and pseudo-dipolar anisotropy only. The brown triangles are the experimental values from Ref. 6.

Image of FIG. 2.
FIG. 2.

(Color online) Relaxation time vs inverse temperature in varying the system size. Circle points are single-axis ASD results, triangle up points are escape time following Brown’s formula with constant magnetization and anisotropy, crosses are Brown-type formula [see Eq. (4)] where the dependence of magnetization and anisotropy is taken into account.

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/content/aip/journal/jap/111/7/10.1063/1.3677932
2012-03-09
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Thermal behavior of superparamagnetic cobalt nanodots explored by anisotropic magnetic molecular dynamics simulations
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/7/10.1063/1.3677932
10.1063/1.3677932
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