Berlin 2005 – wissenschaftliches Programm
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MA: Magnetismus
MA 20: Poster:Schichten(1-29),Spintrsp(30-45),Ex-Bias(46-63),Spindyn(64-75),Mikromat.(76-80),Cluster(81-94),Abbv.(95-99),Obflm(100-02),SpElek.(103-09),E-Theo(110-14),Mikromag.(115-16),Spin+PÜ(117-26),Mag.Mat.(127-51),Meth.(152-55),Mol.Mag(156-59),Kondo(160-65
MA 20.6: Poster
Montag, 7. März 2005, 14:00–18:00, Poster TU C
Rapid Thermal Annealing of FePt thin films — •Jörg Buschbeck, Martin Weisheit, Sebastian Fähler, and Ludwig Schultz — IFW Dresden, Institut für Metallische Werkstoffe, Helmholtzstr. 20, 01069 Dresden
The outstanding intrinsic magnetic properties of the FePt L10 phase make this material a promising candidate for thin film applications. However, the high temperature required to form the L10 phase is a major disadvantage. One overcomes this problem by using thin films, as they allow for rapid heating and cooling without significantly heating the substrate. Such a rapid temperature change can be realized by the application of a pulsed excimer laser (KrF, 248 nm, 25 ns) post-annealing process on films deposited at room temperature. Because of the extremely short heat pulse in the range of µs and the small absorption length of less than 50 nm in the film, the substrate temperature can be kept at ambient temperature during the annealing process. Electrodeposited and pulse-laser deposited FePt films of 700 nm and 40 nm in thickness, respectively, were pulse-heated by the excimer laser. Phase formation and magnetization behavior were studied as a function of laser energy, pulse number, and substrate base temperature.