Study of the magnetic behaviour of nanoparticles with ferromagnetic core/antiferromagnetic shell morphology
Abstract
The magnetic properties of nanoparticles have been subject of continuously growing interest, driven by fundamental research and technological interest especially in the magnetic recording industry and more recently in medicine. The small size of the nanoparticles and the reduced symmetry at their surface result in high coercivity. More recently, the requirement for stable magnetic behavior of the nanoparticles at room temperature led to the development of complex spin nanostructures with core/shell morphology that results to enhanced magnetic anisotropy. Composite nanoparticles with ferromagnetic core/antiferromagnetic shell morphology have an extra anisotropy, the exchange anisotropy which makes them thermally stable in room temperature even in the case of very small size. In the current work we use the Metropolis Monte Carlo method to study the magnetic behaviour of nanoparticles with core/shell morphology which exhibit exchange anisotropy. The advantages of this method is that the m ...
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