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Magnetic Properties and Corrosion Resistance Studies on Hybrid Magnetic Overcoats for Perpendicular Recording Media.
- Source :
-
IEEE Transactions on Magnetics . Apr2010, Vol. 46 Issue 4, p1069-1076. 8p. 1 Chart, 13 Graphs. - Publication Year :
- 2010
-
Abstract
- Magnetic properties and corrosion inhibition properties of hybrid magnetic overcoats (Hy-MOC) that are suitable for ultra-high-density recording are investigated. Two types of Hy-MOC using different types of Co-based alloys were investigated for the magnetic overcoat (MOC). Hy-MOC (α) used CoCrPt : SiO2 (14% SiO2) while Hy-MOC (β) used CoCr22 as the sputtering targets for the reactive sputtering with N2. Magnetic hysteresis loops indicated that both types of Hy—MOC-using various percentages of N2 flow rate—are coupled with the recording layers of the hard disk media. Hy-MOC also increased the coercivity of the perpendicular media which is attributed to the enhanced thermal stability. It was also found that the remanent squareness (S = Mr/Ms of the media using the MOC was closer to 1. The negative nucleation field Hn of the media using Hy-MOC (α) also showed a slight increase as compared to the medium without Hy-MOC but it is not seen for the media using Hy-MOC (β). Potentiodynamic polarization analysis of Hy-MOC samples also indicated that the Hy-MOC are able to provide sufficient corrosion protection for the hard disk media; and they are as good or even better than 2 nm amorphous carbon overcoat. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189464
- Volume :
- 46
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Magnetics
- Publication Type :
- Academic Journal
- Accession number :
- 48971728
- Full Text :
- https://doi.org/10.1109/TMAG.2009.2037430