Abstract
Nb addition to Co–Cr perpendicular magnetic recording films has been investigated. Co 74–Cr 22–Nb 4 films exhibited high H c⊥ values surpassing a Co–Cr binary system and satisfied a guiding scheme for a low-noise medium. It was found that the domain size of the film as well as SQ ⊥ was an important factor determining medium noise and that the domain size should be smaller to realize a lower medium noise and a higher resolution. MFM observation revealed that high-density recording up to 400 kFRPI and 17 Gbit/in 2 could be achieved for the Co 74–Cr 22–Nb 4 system.
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