Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 47: Micro- and Nanostructured Magnetic Materials II
MA 47.5: Vortrag
Donnerstag, 29. März 2012, 18:15–18:30, EB 202
Hard magnetic (001)-textured FePtCu bit patterned media — •Patrick Matthes1, Torbjörn Eriksson2, Thomas Werner3, Beate Mainz1, and Manfred Albrecht1 — 1Inst. of Physics, Chemnitz University of Technology, DE-09107 Chemnitz — 2Obducat Technologies AB, SE-20125 Malmö — 3Center for Microtechnology, Chemnitz University of Technology, DE-09126 Chemnitz
To overcome the areal density limit of conventional magnetic materials for hard disk drives due to thermal instability problems, new materials with high Ku and new concepts for magnetic recording will be necessary [1]. In order to resolve the recording trilemma the recording principle of bit patterned media has been proposed [2] and in combination with FePt based alloys an areal density beyond 1 Tb/in.2 is possible [1]. In this study hard magnetic 6 nm thick FePtCu films were prepared by sputtering at room temperature and post annealing. A dot array with a dot size of 20 nm and a period of 60 nm was then fabricated by post patterning using nanoimprint lithography. The fabricated dots are in a single domain state and reveal a rather sharp switching field distribution. The latter can be explained by the post-patterning process which induces damage to the side walls of the dots affecting their switching field. [3].
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