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https://scholarbank.nus.edu.sg/handle/10635/118580
DC Field | Value | |
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dc.title | Ferromagnetic Resonance Studies of Low Damping Multilayer Films with perpendicular Magnetic Anisotropy for Memory Applications | |
dc.contributor.author | MARIA PATRICIA ROUELLI GARCIA SABINO | |
dc.date.accessioned | 2015-01-31T18:00:36Z | |
dc.date.available | 2015-01-31T18:00:36Z | |
dc.date.issued | 2014-08-20 | |
dc.identifier.citation | MARIA PATRICIA ROUELLI GARCIA SABINO (2014-08-20). Ferromagnetic Resonance Studies of Low Damping Multilayer Films with perpendicular Magnetic Anisotropy for Memory Applications. ScholarBank@NUS Repository. | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/118580 | |
dc.description.abstract | The key to further downscaling spintronic devices such as spin-transfer torque magnetoresistive random access memory (STT-MRAM) is the use of magnetic materials with perpendicular magnetic anisotropy (PMA). On top of this, the free layer needs to consist of a low damping ( α) material for high spin torque switching efficiency. In this thesis, vector network analyzer ferromagnetic resonance is used as the primary tool to investigate PMA systems with low damping, starting with a study of the intrinsic damping parameter α0 in Co/Ni multilayers and the first report of intrinsic damping measurements of a perpendicular CoFeB/MgO-based stack. Because α 0 in MgO/CoFeB/MgO ("double MgO") stacks are measured to be around 300% smaller than in Co/Ni multilayers, the double MgO system is further developed to exhibit large PMA via the insertion of ultrathin Ta layers into the CoFeB layer. Evidence of the non-proportional relationship between anisotropy and damping in the CoFeB/MgO system is then presented, and implications on the theoretical model of its perpendicular magnetic anisotropy are additionally explored. | |
dc.language.iso | en | |
dc.subject | ferromagnetic resonance, magnetic fi lms, Co/Ni multilayers, CoFeB/MgO, damping, perpendicular magnetic anisotropy | |
dc.type | Thesis | |
dc.contributor.department | ELECTRICAL & COMPUTER ENGINEERING | |
dc.contributor.supervisor | LIEW YUN FOOK | |
dc.description.degree | Ph.D | |
dc.description.degreeconferred | DOCTOR OF PHILOSOPHY | |
dc.identifier.isiut | NOT_IN_WOS | |
Appears in Collections: | Ph.D Theses (Open) |
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SabinoMPRG.pdf | 9.3 MB | Adobe PDF | OPEN | None | View/Download |
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