Room temperature magnetic stabilization of buried cobalt nanoclusters within a ferromagnetic matrix studied by soft x-ray magnetic circular dichroism

Abstract

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Tuning the coercive field of Ni and CuNi thin films with the embedding of Co nanoparticles: An element-specific study

“…The coercivity values (in Oe) are shown as insets on the graphs. The nanoparticle magnetization follows very closely that of the embedding matrix in both cases, showing there is strong exchange coupling between the nanoparticles and the film [11]. The coercivity change with different nanoparticle positions is evident, with a larger coercive field when the nanoparticles are on the surface of the magnetic film as opposed to embedded within it.…”

“…There have been a number of studies investigating magnetic nanoparticles embedded within a magnetic matrix using XMCD [7][8][9][10][11], however, these often focus on the magnetic behavior of the nanoparticles, important for applications such as ultrahighdensity data storage [12] or medical applications incorporating magnetic nanoparticles [13]. In this study, however, we also look at how the nanoparticles affect the magnetic behavior of the magnetic matrix as well as the magnetic behavior of the nanoparticles as a coupled system, leading to the prospect of using the controlled embedding of nanoparticles as a way of controlling the coercivity of thin films.…”

Single electron spintronics

“…Three-terminal structures with wrap-around gates showing single-electron effects at room temperature have very recently been demonstrated using non-magnetic materials, using processes compatible with the usual industrial planar processing methods [11]. It is now possible to prepare magnetic nanoparticles with very well-defined sizes under ultrahigh vacuum conditions [129,130], ideal for incorporation into spintronic versions of such structures, offering a realistic prospect of useful devices based on single spin effects.…”