Abstract
We have investigated the correlation between activation grain diameter derived from activation volume and intergranular magnetic interaction, in CoCrPt-based thin film media fabricated by ultra clean sputtering process. As the results, we found that activation grain diameter depends on the physical grain diameter and intergranular exchange interaction, but is independent of intergranular magnetostatic interaction (4πMs/Hkgrain). The activation grain diameter normalized by physical grain diameter, which corresponds with normalized coercivity (Hc/Hkgrain) and microstructure, well indicate the character of intergranular exchange interaction in the media with various compositions. It is also clarified that the media noise can be characterized by activation grain diameter together with intergranular magnetostatic interaction.
Original language | English |
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Pages (from-to) | 1484-1487 |
Number of pages | 4 |
Journal | IEEE Transactions on Magnetics |
Volume | 37 |
Issue number | 4 I |
DOIs | |
Publication status | Published - 2001 Jul |
Externally published | Yes |
Event | 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: 2001 Jan 7 → 2001 Jan 11 |
Keywords
- Activation volume
- Exchange interaction
- Longitudinal media
- Thin film
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering