Nanocomposite CoPt:C films for extremely high-density recording

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

Research output: Contribution to journalArticle

149 Citations (Scopus)

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
StatePublished - Dec 20 1999

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coercivity
nanocomposites
recording
grain size
annealing
thermal stability
film thickness
activation
requirements
temperature
matrices

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Nanocomposite CoPt:C films for extremely high-density recording. / Yu, M.; Liu, Y.; Moser, A.; Weller, D.; Sellmyer, D. J.

In: Applied Physics Letters, Vol. 75, No. 25, 20.12.1999, p. 3992-3994.

Research output: Contribution to journalArticle

Yu, M. ; Liu, Y. ; Moser, A. ; Weller, D. ; Sellmyer, D. J. / Nanocomposite CoPt:C films for extremely high-density recording. In: Applied Physics Letters. 1999 ; Vol. 75, No. 25. pp. 3992-3994.
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