Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 46: Magnetic Thin Films II
MA 46.1: Vortrag
Mittwoch, 16. März 2011, 17:00–17:15, CHE 184
Flash-lamp annealing of FexPt100−x films — •Christoph Brombacher1, Marcus Daniel1, Thomas Schumann2, Sven Häberlein3, Jörn Donges4, Andreas Liebig1, Gunter Beddies1, Wolfgang Skorupa2, and Manfred Albrecht1 — 1Chemnitz University of Technology, Institute of Physics, Chemnitz, Germany — 2Institute of Ion Beam Physics and Materials Research, FZD, Dresden, Germany — 3FHR Anlagenbau GmbH, Dresden, Germany — 4HASYLAB, DESY, Hamburg, Germany
Flash-lamp annealing with annealing times in the millisecond time regime was used to transform sputter deposited FexPt100−x films (42 ≤ x ≤ 60) from the chemically disordered A1 phase into the chemically ordered L10 phase which exhibits a large uniaxial magnetocrystalline anisotropy. The evolution of the magnetic and structural properties upon flash-lamp annealing was investigated with respect to the chemical composition and the annealing temperature. It could be demonstrated that an annealing time of 20 ms is sufficient to induce the A1 to L10 phase transformation. The fabricated polycrystalline Fe52Pt48 films exhibit a high degree of L10 order which leads to an isotropic magnetic behavior with coercivities up to (10.4 ± 0.5) kOe. A variation of the Fe content x from 42 ≤ x ≤ 60 revealed that the largest volume fraction of chemically ordered grains is formed for slightly Fe enriched FexPt100−x films, whereas the grain growth was observed to be independent on the chemical composition.
This work was financially supported by the EU project TERAMAGSTOR (No. FP7-224001) and by HASYLAB (No. I-20100067).