dc.contributor.authorDutta, Tanmay
dc.contributor.authorPiramanayagam, S. N.
dc.contributor.authorRu, Tan Hui
dc.contributor.authorSaifullah, M. S. M.
dc.contributor.authorBhatia, C. S.
dc.contributor.authorYang, Hyunsoo
dc.identifier.citationDutta, T., Piramanayagam, S. N., Ru, T. H., Saifullah, M. S. M., Bhatia, C. S., & Yang, H. (2018). Exchange coupled CoPt/FePtC media for heat assisted magnetic recording. Applied Physics Letters, 112(14), 142411-. doi:10.1063/1.5012815en_US
dc.description.abstractL10 FePtC granular media are being studied as potential future magnetic recording media and are set to be used in conjunction with heat assisted magnetic recording (HAMR) to enable recording at write fields within the range of current day recording heads. Media structures based on a FePtC storage layer and a capping layer can alleviate the switching field distribution (SFD) requirements of HAMR and reduce the noise originating from the writing process. However, the current designs suffer from SFD issues due to high temperature writing. To overcome this problem, we study a CoPt/FePtC exchange coupled composite structure, where FePtC serves as the storage layer and CoPt (with higher Curie temperature, Tc) as the capping layer. CoPt remains ferromagnetic at near Tc of FePtC. Consequently, the counter exchange energy from CoPt would reduce the noise resulting from the adjacent grain interactions during the writing process. CoPt/FePtC bilayer samples with different thicknesses of CoPt were investigated. Our studies found that CoPt forms a continuous layer at a thickness of 6 nm and leads to considerable reduction in the saturation field and its distribution.en_US
dc.description.sponsorshipASTAR (Agency for Sci., Tech. and Research, S’pore)en_US
dc.format.extent5 p.en_US
dc.relation.ispartofseriesApplied Physics Lettersen_US
dc.rights© 2018 The Author(s). All rights reserved. This paper was published by AIP in Applied Physics Letters and is made available with permission of The Author(s).en_US
dc.subjectChemical Elementsen_US
dc.subjectExchange Couplingen_US
dc.titleExchange coupled CoPt/FePtC media for heat assisted magnetic recordingen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.description.versionPublished versionen_US

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