Exchange coupled CoPt/FePtC media for heat assisted magnetic recording

L10 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 la...

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Main Authors: Dutta, Tanmay, Piramanayagam, S. N., Ru, Tan Hui, Saifullah, M. S. M., Bhatia, C. S., Yang, Hyunsoo
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/82979
http://hdl.handle.net/10220/47548
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-829792023-02-28T19:31:14Z Exchange coupled CoPt/FePtC media for heat assisted magnetic recording Dutta, Tanmay Piramanayagam, S. N. Ru, Tan Hui Saifullah, M. S. M. Bhatia, C. S. Yang, Hyunsoo School of Physical and Mathematical Sciences Exchange Coupling DRNTU::Science::Physics Chemical Elements L10 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. ASTAR (Agency for Sci., Tech. and Research, S’pore) Published version 2019-01-23T03:18:11Z 2019-12-06T15:09:27Z 2019-01-23T03:18:11Z 2019-12-06T15:09:27Z 2018 Journal Article Dutta, 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:10.1063/1.5012815 0003-6951 https://hdl.handle.net/10356/82979 http://hdl.handle.net/10220/47548 10.1063/1.5012815 en Applied Physics Letters © 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). 5 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Exchange Coupling
DRNTU::Science::Physics
Chemical Elements
spellingShingle Exchange Coupling
DRNTU::Science::Physics
Chemical Elements
Dutta, Tanmay
Piramanayagam, S. N.
Ru, Tan Hui
Saifullah, M. S. M.
Bhatia, C. S.
Yang, Hyunsoo
Exchange coupled CoPt/FePtC media for heat assisted magnetic recording
description L10 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.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Dutta, Tanmay
Piramanayagam, S. N.
Ru, Tan Hui
Saifullah, M. S. M.
Bhatia, C. S.
Yang, Hyunsoo
format Article
author Dutta, Tanmay
Piramanayagam, S. N.
Ru, Tan Hui
Saifullah, M. S. M.
Bhatia, C. S.
Yang, Hyunsoo
author_sort Dutta, Tanmay
title Exchange coupled CoPt/FePtC media for heat assisted magnetic recording
title_short Exchange coupled CoPt/FePtC media for heat assisted magnetic recording
title_full Exchange coupled CoPt/FePtC media for heat assisted magnetic recording
title_fullStr Exchange coupled CoPt/FePtC media for heat assisted magnetic recording
title_full_unstemmed Exchange coupled CoPt/FePtC media for heat assisted magnetic recording
title_sort exchange coupled copt/feptc media for heat assisted magnetic recording
publishDate 2019
url https://hdl.handle.net/10356/82979
http://hdl.handle.net/10220/47548
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