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標題: The intermixing induced perpendicular magnetic anisotropy in ultrathin Co/Pt multilayers
作者: Su, C.H.
Lo, S.C.
van Lierop, J.
Lin, K.W.
Ouyang, H.
關鍵字: alloys
Project: Journal of Applied Physics
期刊/報告no:: Journal of Applied Physics, Volume 105, Issue 7.
It has been observed that a perpendicular interface contribution to the magnetic anisotropy can rotate the easy magnetization direction from within the film plane to perpendicular to the film plane when the Co thickness in Co/Pt multilayers is below a critical value that is in the range of (sub) nanometers. In this work, mixed CoPt phases mainly consisting of disordered fcc CoPt were found to be responsible for the perpendicular magnetic anisotropy (PMA) for the film deposition end-Hall voltage equal to 140 V. Estimates of mechanisms that could be responsible for the PMA such as "orange peel" coupling, exchange bias, and magnetostriction indicate that they are too weak. We believe that this PMA is driven by the heat of mixing and relatively higher interfacial energy since the Co layer thickness is about 1 nm. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3070639]
ISSN: 0021-8979
DOI: 10.1063/1.3070639
Appears in Collections:材料科學與工程學系

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