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MA: Fachverband Magnetismus

MA 11: Magnetic Thin Films I

MA 11.3: Talk

Tuesday, March 27, 2007, 10:45–11:00, H10

Micromagnetic analysis of the coercivity of hard magnetic L1₀-FePt thin films — •Dagmar Goll, Nam Hoon Goo, and Wilfried Sigle — Max-Planck-Institut für Metallforschung, Heisenbergstr. 3, 70569 Stuttgart

FePt thin films in the ordered face-centered tetragonal structure (L1₀-phase) have gained significant attention for ultrahigh-density magnetic recording and high-performance permanent magnets due to their outstanding intrinsic magnetic properties and their chemical stability. Starting from Fe-Pt-multilayers of different individual layer thicknesses by postannealing either highly textured or isotropic L1₀-FePt monolayers are formed. The formation of the L1₀ phase has been studied in situ during annealing by using high-resolution transmission electron microscopy. The determination of the microstructural parameters allows a quantitative correlation between the microstructure and the magnetic properties.