Production of Oxide-Passivated Nanosized Co Particles Dispersed in a Two-Dimensional Plane

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Abstract
The initial island structure in the film grown by vacuum deposition is useful for the sample preparation of nanosized particles. The Co particles produced by this method had a narrow size distribution, and the stable Co cores were surrounded with thin CoO shells in air. These ferromagnetic particles are dispersed in a two-dimensional plane and have single magnetic domains; thus they have an interesting form for the study of the magnetic interaction among particles. The effects of vacuum pressure and deposition time for oxidation were investigated in samples produced with a constant amount of evaporation.