Self Assembling Magnetic Nanomaterials

概要

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This paper reviews general chemical synthetic approaches to monodisperse magnetic nanoparticles and nanoparticle arrays (superlattices). Advances in magnetic recording technology have driven the development of novel magnetic nanoparticle-based media/ devices with uniformity in particle size and particle magnetics. Self-assembly of magnetic nanoparticles may offer an easy way of fabricating such media/ devices. Examples based on the synthesis and assembly of cobalt and iron-platinum nanoparticles are illustrated in this paper. The particles are prepared by metal salt reduction and metal carbonyl decomposition. Synthetic conditions control particle size, shape, internal particle structure and alloy composition. Depositing particle dispersions on a solid substrate and controlling solvent evaporation realizes self-organized nanoparticle arrays. The structure of these arrays depends on factors like particle size and shape. Magnetic properties in FePt arrays can be tuned from superparamagnetic to ferromagnetic via thermal annealing. These magnetic nanoparticle arrays are of great interest for future fabrication of ultra-high density magnetic recording media.
社団法人日本磁気学会の論文
2001-08-01