Berlin 2005 – scientific programme

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MA: Magnetismus

MA 7: Magnetische dünne Schichten II

MA 7.13: Talk

Friday, March 4, 2005, 18:15–18:30, TU H1012

Hard magnetic electrodeposited FePt films — •Karin Leistner, Andreas Krause, Heike Schlörb, Martin Weisheit, Ludwig Schultz, and Sebastian Fähler — IFW Dresden, Helmholtzstraße 20, 01069 Dresden

FePt is a promising material for hard magnetic films in MEMS or magnetic data storage due to its high magnetocrystalline anisotropy and saturation magnetization. Electrodeposition of FePt films would be a low cost alternative to physical vapor deposition techniques. As deposited films are amorphous and a large fraction of oxygen is incorporated. Quartz microbalance studies have been carried out in order to gain knowledge about the deposition processes and the mechanism of oxygen incorporation. The oxygen content is reduced when annealing in hydrogen, and as a result magnetization values are increased. Microstructure evolution during annealing has been studied and can be correlated to the hard magnetic properties. Coercivities up to 1.1 T can be achieved after annealing at 600^∘C in hydrogen.