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Journal Articles The European Physical Journal D : Atomic, molecular, optical and plasma physics Year : 2017

Size effects of the magnetic anisotropy of fcc cobalt nanoparticles embedded in copper

Abstract

Cobalt nanoparticles embedded in copper matrices show strong size effects in the magnetic anisotropy with a non-monotonous dependence on the particle diameter. In this article we discuss quantitative values of the magnetic anisotropy in the frame of two models: in small clusters the surface anisotropy contribution dominates whereas larger particles (>3 nm diameter) have an elliptic shape leading to increased shape anisotropy. The crystalline structure of the particles is shown to be face-centered cubic, justifying that the magneto-crystalline anisotropy can be neglected.
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Dates and versions

hal-02004432 , version 1 (14-02-2019)

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Matthias Hillenkamp, Simón Oyarzún, Nicolas Troc, Julien Ramade, Alexandre Tamion, et al.. Size effects of the magnetic anisotropy of fcc cobalt nanoparticles embedded in copper. The European Physical Journal D : Atomic, molecular, optical and plasma physics, 2017, 71 (12), pp.330. ⟨10.1140/epjd/e2017-80299-x⟩. ⟨hal-02004432⟩
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