Dresden 2006 – wissenschaftliches Programm
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DS: Dünne Schichten
DS 15: Thin magnetic films
DS 15.2: Vortrag
Mittwoch, 29. März 2006, 16:15–16:30, GER 38
Order by smoothness - crystallization at amorphous interfaces — •Andreas Liebig1, Hans Lidbaum2, Panagiotis Korelis1, Gabriella Andersson1, Klaus Leifer2, and Björgvin Hjörvarsson1 — 1Department of Physics, Uppsala University, Box-530, SE-75121 Uppsala, Sweden — 2Department of Engineering Sciences, Uppsala University, Box 534, SE-751 21 Uppsala, Sweden
The structural and magnetic properties of amorphous Fe90Zr10 thin films and multilayers have been investigated by x-ray diffraction and TEM. Crystallites of limited size are observed at the interface between the iron-zirconium layers and the underlying amorphous oxide. The interface related seeding of crystallites suggests the presence of a purely symmetry-induced ordering.
The magnetic properties are strongly affected by the interface density. The ordering temperature for thin films is around 200 K, which is comparable to the ordering temperature for bulk samples. For samples with high interface density, the Curie temperature can be increased up to 360 K. The origin of the shift in the ordering temperature, as well as the interface induced crystallization will be discussed.