Perpendicular FePt-based exchange-coupled composite media

Makarov, D.; Lee, J.; Brombacher, C.; Schubert, C.; Fuger, M.; Suess, D.; Fidler, J.; Albrecht, M.
February 2010
Applied Physics Letters;2/8/2010, Vol. 96 Issue 6, p062501
Academic Journal
Exchange-coupled composite media were realized by combining perpendicular hard magnetic FePtCu alloy films with perpendicular Co/Pt multilayers which are magnetically softer. We demonstrate that the switching field of the hard layer can be efficiently altered by modifying the material properties of the soft layer by varying the number of Co/Pt bilayers. Moreover, the possibility of effectively tuning the interlayer exchange coupling using rapid thermal annealing was shown. These studies were supported by theoretical modeling revealing the relevant factors to reduce the switching field of the hard layer which are important for future media design.


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