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Dresden 2009 – scientific programme

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MA: Fachverband Magnetismus

MA 20: Micro- and Nanostructured Magnetic Materials I

MA 20.2: Talk

Wednesday, March 25, 2009, 13:00–13:15, HSZ 403

Magnetic properties of exchange-coupled L10-FePt/Fe nanostructures — •Achim Breitling, Thomas Bublat, and Dagmar Goll — MPI für Metallforschung, Stuttgart, Germany

Nanopatterned L10-FePt/Fe composite media with perpendicular magnetization are considered to be one of the most straightforward concepts to achieve ultrahigh storage densities in magnetic recording. The hard magnetic component L10-FePt guarantees thermal stability for smallest dot sizes whereas the soft magnetic component Fe reduces the coercivity and thus enables conventional write heads to store information in such patterns.

To optimize the L10-FePt/Fe nanopatterns the influence of the microstructure and of the composition on the magnetic properties of the L10-FePt part has been studied systematically within the ferromagnetic temperature range. Furthermore a technique has been developed to manipulate the character of the L10-FePt/Fe interface resulting in a gradual change of the material parameters. The nanostructures have been fabricated by advanced lithography methods and by annealing at elevated temperatures.

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