By Topic

Magnetic Properties and Corrosion Resistance Studies on Hybrid Magnetic Overcoats for Perpendicular Recording Media

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Wei Choong Poh ; Data Storage Inst., A*STAR, Singapore, Singapore ; Piramanayagam, S.N. ; Liew, T.

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(??) used CoCrPt:SiO2 (14% SiO2) while Hy-MOC(??) 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(??) also showed a slight increase as compared to the medium without Hy-MOC but it is not seen for the media using Hy- MOC(??). 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.

Published in:

Magnetics, IEEE Transactions on  (Volume:46 ,  Issue: 4 )