Nanocomposite CoPt:C films for extremely high-density recording

M. Yu, Y. Liu, A. Moser, D. Weller, D. J. Sellmyer

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Abstract

Nanocomposite CoPt:C films were investigated as potential media for extremely high-density recording. An annealing temperature of over 600°C is necessary to form nanocomposite CoPt:C films consisting of C matrix and fct CoPt nanocrystallites with grain sizes of 8-20 nm and coercivities of 3-12 kOe. Coercivity and grain size increase with increasing annealing temperature and decreasing C concentration and they are insensitive to film thickness. The average activation volumes are about 0.9×10-18cm3. The properties of these nanocomposite CoPt:C films can be tailored to satisfy the thermal stability, coercivity, and media noise requirements for extremely high-density recording.

Original languageEnglish (US)
Pages (from-to)3992-3994
Number of pages3
JournalApplied Physics Letters
Volume75
Issue number25
DOIs
Publication statusPublished - Dec 20 1999

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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