Investigations of stacking faults in stacked granular perpendicular recording media with a high anisotropy CoPt layer

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Investigations of stacking faults in stacked granular perpendicular recording media with a high anisotropy CoPt layer
Title:
Investigations of stacking faults in stacked granular perpendicular recording media with a high anisotropy CoPt layer
Journal Title:
Magnetics, IEEE Transactions on
Keywords:
Publication Date:
01 November 2014
Citation:
Yi Yang; Varghese, B.; Hang Khume Tan; Seng Kai Wong; Piramanayagam, S.N., "Investigations of Stacking Faults in Stacked Granular Perpendicular Recording Media With a High-Anisotropy CoPt Layer," in Magnetics, IEEE Transactions on , vol.50, no.11, pp.1-4, Nov. 2014 doi: 10.1109/TMAG.2014.2327956
Abstract:
Microstructural investigations of granular perpendicular recording media based on stacked CoPt-alloy layers were carried out using high resolution transmission electron microscopy (HRTEM). In the structure investigated, a thin layer of CoPt with high Pt concentration was inserted in order to meet the thermal stability requirements at higher densities. The increase in the coercivity and nucleation field of the sample observed for the insertion of a thin layer of CoPt (3 nm), and the decrease beyond this critical thickness has been explained based on HRTEM studies. HRTEM results indicated that the insertion of thicker CoPt layer causes stacking faults and the presence of fcc phase in the CoCrPt layers on the top. The number of stacking faults and the fcc-content in grains depends on the thickness of CoPt layer, indicating that the observed changes in magnetic properties arise due to the microstructural changes.
License type:
PublisherCopyrights
Funding Info:
Description:
(c) 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
ISSN:
0018-9464
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