Abstract
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 language | English (US) |
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Pages (from-to) | 1671-1674 |
Number of pages | 4 |
Journal | IEEE Transactions on Magnetics |
Volume | 37 |
Issue number | 4 I |
DOIs | |
State | Published - Jul 2001 |
Event | 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: Jan 7 2001 → Jan 11 2001 |
Keywords
- CoPtC
- Magnetic thin films
- Nanocomposite materials
- Recording media
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering