Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.4768838
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dc.titleSpacer-less, decoupled granular L10 FePt magnetic media using Ar-He sputtering gas
dc.contributor.authorKundu, S.
dc.contributor.authorGaur, N.
dc.contributor.authorSaifullah, M.S.M.
dc.contributor.authorYang, H.
dc.contributor.authorBhatia, C.S.
dc.date.accessioned2014-10-07T04:36:35Z
dc.date.available2014-10-07T04:36:35Z
dc.date.issued2012-12-01
dc.identifier.citationKundu, S., Gaur, N., Saifullah, M.S.M., Yang, H., Bhatia, C.S. (2012-12-01). Spacer-less, decoupled granular L10 FePt magnetic media using Ar-He sputtering gas. Journal of Applied Physics 112 (11) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.4768838
dc.identifier.issn00218979
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/83042
dc.description.abstractSpacer materials are often used to fabricate granular L10 FePt media and reduce the grain size, however, at the expense of reduced out-of-plane coercivity. Here, we demonstrate a spacer-less method in which adding 1% helium to argon sputtering gas leads to a substantial improvement in the chemical ordering, as well as the magnetic and microstructural properties of FePt. This change is attributed to the modification in the ion current density of the plasma caused by the excited metastable helium species. Helium plays a pivotal role in providing the Fe and Pt atoms optimal adatom mobility, thereby, producing well-ordered L10 FePt media. This leads to an enhancement of the out-of-plane coercivity from 15 to 22 kOe. Furthermore, exchange decoupled grains with a twofold reduction in their diameter to ∼24nm are also achieved. These properties are crucial for magnetic media of the future for data storage recording densities beyond 1 Tb/in2. © 2012 American Institute of Physics.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1063/1.4768838
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.doi10.1063/1.4768838
dc.description.sourcetitleJournal of Applied Physics
dc.description.volume112
dc.description.issue11
dc.description.page-
dc.description.codenJAPIA
dc.identifier.isiut000312490700078
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