Two-step temperature deposited FePt bilayer for tunable magnetic properties
Tuning the magnetic properties of FePt media is of great interest in the bid to achieve high areal densities. In this work, we demonstrate that properties of FePt media can be tuned using a two-step temperature deposited FePt bilayer. In this bilayer scheme, the first layer of FePt was deposited at...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/104414 http://hdl.handle.net/10220/38978 |
| _version_ | 1824457124557619200 |
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| author | Dutta, Tanmay Kundu, Shreya Saifullah, M. S. M. Yang, Hyunsoo Piramanayagam, Seidikkurippu Nellainayagam Bhatia, C. S. |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Dutta, Tanmay Kundu, Shreya Saifullah, M. S. M. Yang, Hyunsoo Piramanayagam, Seidikkurippu Nellainayagam Bhatia, C. S. |
| author_sort | Dutta, Tanmay |
| collection | NTU |
| description | Tuning the magnetic properties of FePt media is of great interest in the bid to achieve high areal densities. In this work, we demonstrate that properties of FePt media can be tuned using a two-step temperature deposited FePt bilayer. In this bilayer scheme, the first layer of FePt was deposited at a high nominal temperature (600 °C), whilst the second layer was deposited at a lower temperature over the first layer. This resulted in tunable magnetic and improved topographical properties, and was due to the interplay of a number of temperature-dependent factors such as epitaxial growth, new grain nucleation, surface mobility, and difference in the thermal expansion coefficients. Transmission electron microscopy imaging was used to understand the growth dynamics of the second FePt layer in the two-step temperature deposited structures. |
| first_indexed | 2025-02-19T04:05:01Z |
| format | Journal Article |
| id | ntu-10356/104414 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T04:05:01Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/1044142023-02-28T19:45:12Z Two-step temperature deposited FePt bilayer for tunable magnetic properties Dutta, Tanmay Kundu, Shreya Saifullah, M. S. M. Yang, Hyunsoo Piramanayagam, Seidikkurippu Nellainayagam Bhatia, C. S. School of Physical and Mathematical Sciences FePt bilayer HAMR Tunable magnetic Coercivity Magnetic recording Exchange coupled Two-step temperature Tuning the magnetic properties of FePt media is of great interest in the bid to achieve high areal densities. In this work, we demonstrate that properties of FePt media can be tuned using a two-step temperature deposited FePt bilayer. In this bilayer scheme, the first layer of FePt was deposited at a high nominal temperature (600 °C), whilst the second layer was deposited at a lower temperature over the first layer. This resulted in tunable magnetic and improved topographical properties, and was due to the interplay of a number of temperature-dependent factors such as epitaxial growth, new grain nucleation, surface mobility, and difference in the thermal expansion coefficients. Transmission electron microscopy imaging was used to understand the growth dynamics of the second FePt layer in the two-step temperature deposited structures. Accepted version 2015-12-07T05:45:40Z 2019-12-06T21:32:16Z 2015-12-07T05:45:40Z 2019-12-06T21:32:16Z 2015 2015 Journal Article Dutta, T., Kundu, S., Saifullah, M. S. M., Yang, H., Piramanayagam, S. N., & Bhatia, C. S. (2015). Two-step temperature deposited FePt bilayer for tunable magnetic properties. Journal of Physics D: Applied Physics, 48, 445007-. https://hdl.handle.net/10356/104414 http://hdl.handle.net/10220/38978 10.1088/0022-3727/48/44/445007 188951 en Journal of Physics D: Applied Physics © 2015 IOP Publishing Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Physics D: Applied Physics, IOP Publishing Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1088/0022-3727/48/44/445007]. application/pdf |
| spellingShingle | FePt bilayer HAMR Tunable magnetic Coercivity Magnetic recording Exchange coupled Two-step temperature Dutta, Tanmay Kundu, Shreya Saifullah, M. S. M. Yang, Hyunsoo Piramanayagam, Seidikkurippu Nellainayagam Bhatia, C. S. Two-step temperature deposited FePt bilayer for tunable magnetic properties |
| title | Two-step temperature deposited FePt bilayer for tunable magnetic properties |
| title_full | Two-step temperature deposited FePt bilayer for tunable magnetic properties |
| title_fullStr | Two-step temperature deposited FePt bilayer for tunable magnetic properties |
| title_full_unstemmed | Two-step temperature deposited FePt bilayer for tunable magnetic properties |
| title_short | Two-step temperature deposited FePt bilayer for tunable magnetic properties |
| title_sort | two step temperature deposited fept bilayer for tunable magnetic properties |
| topic | FePt bilayer HAMR Tunable magnetic Coercivity Magnetic recording Exchange coupled Two-step temperature |
| url | https://hdl.handle.net/10356/104414 http://hdl.handle.net/10220/38978 |
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