Magnetic Metal Alloy-Carbon Nanocomposite Thin Films by Pulsed Filtered Vacuum Arc Deposition (第7回アジア情報記録技術シンポジウム〔英文〕)

概要

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CoPt-C, FePt-C and PrCo-C nanocomposite thin this films were prepared by a pulsed filtered vacuum are deposition technique. Vacuum thermal annealing and rapid thermal annealing were performed at various temperatuers. The dependence of the magnetic properties on the carbon fraction and annealing temperatuer was studied. For the film with a particular composition of Fe_<43>Pt_<35>C_<22>, the coercivity and the grain size were observed to increase with increasing annealing temperature, up to a vlue of 3.5 kOe at an annealing temperature of 650℃, and with a grain size about 10.5 nm. For the sample of (Pr_<0.17>Co_<0.83>)_<69>C_<31> annealed at 700℃ for one minute, it showed a large coercivity of 5.2 kOe and a small grain size of 7.8nm. The overall small negative ΔM of this film indicated that virtually all the Pr_<0.17>Co_<0.83> grains were isolated single domain particles with only weak dipolar interactions among them. These results indicated that these nanocomposite thin films would be promising candidates for high-density magnetic recording medium applications.
2002-11-07