Disk substrate deposition techniques for monodisperse chemically synthesized FePt nanoparticle media

Kodama, Hiroyoshi; Momose, Satoru; Ihara, Nobutaka; Uzumaki, Takuya; Tanaka, Atsushi
December 2003
Applied Physics Letters;12/22/2003, Vol. 83 Issue 25, p5253
Academic Journal
Self-assembled FePt nanoparticles hold promise for future ultrahigh-density magnetic recording media because of their high anisotropy and capability to be formed into small and uniform grains. By using a special spin coater, we were able to form a dense array of FePt particles across the entire surface of a 2.5 in. disk substrate. Our method can control the number of layers of FePt nanoparticles. The media deposited with FePt nanoparticles by the spin coater was annealed in a vacuum. We measured read–write properties of the FePt nanoparticle media on a spin stand, and succeeded in detecting a signal of 290 kfci. © 2003 American Institute of Physics.


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