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 20.5: Poster
Montag, 7. März 2005, 14:00–18:00, Poster TU C
Influence of a forming gas atmosphere on the properties of laser deposited FePt thin films — •Robert Maaß, Martin Weisheit, Sebastian Fähler, and Ludwig Schultz — Institut für Metallische Werkstoffe, IFW Dresden, Helmholtzstr. 20, 01069 Dresden
The FePt L10 phase is one of the most promising candidates for future perpendicular high density magnetic recording media. However, high temperatures are required for a well ordered structure, around 800∘C for laser deposited films [1]. Lowering the ordering temperature is therefore of great interest. Recent work on electrodeposited FePt thin films has shown that a hydrogen atmosphere during post annealing strongly enhances the ordering of the FePt L10 phase [2]. We report on the the influence of forming gas (5% H2 in Ar) on the ordering temperature of L10 FePt alloy films prepared by pulsed laser deposition onto single crystal MgO substrates. Pressure and temperature dependent changes in microstructure, crystallographic texture and resulting magnetic properties are discussed.
[1] M. Weisheit, L. Schultz, and S. Fähler, J. Appl. Phys. 95 (2004) 7489
[2] K. Leistner, H. Schlörb, M. Weisheit, L. Schultz, and S. Fähler, Appl. Phys. Lett. 85 (2004) 3498