Magnetic properties and nanostructures of composite CoxPt100-x:C thin films

M. L. Yan, Y. Liu, M. J. Yu, S. H. Liou, D. J. Sellmyer

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations


Nanocomposite CoxPt100-x:C thin films with x = 57 and x = 50 were prepared by magnetron sputtering. Structures and activation volumes were studied systematically in order to better understand the magnetic behavior. We found that activation volumes of these two samples were almost the same. However, physical grain sizes of these two samples were different. Magnetic grains in the sample with equiatomic Co and Pt composition were almost independently switched and magnetic grains in the sample with higher Co content were exchange coupled and switched together. The reduction of the physical grain size in the sample does not always cause the reduction of the exchange coupling in the sample. Our results indicate that the Co concentration is an additional factor to be used for controlling the properties of nanocomposite CoPt:C films.

Original languageEnglish (US)
Pages (from-to)1671-1674
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number4 I
StatePublished - Jul 2001
Event8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States
Duration: Jan 7 2001Jan 11 2001


  • CoPtC
  • Magnetic thin films
  • Nanocomposite materials
  • Recording media

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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