Dresden 2009 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 40: Poster II: Bio- and Molecular Magnetism (1-9); Magnetic Coupling Phenomena/Exchange Bias (10-15); Magnetic Particlicles and Clusters (16-29); Micro and Nanostructured Magnetic Materials (30-51); Multiferroics (52-64); Spin Injection in Heterostructures (65-67); Spin-Dyn./Spin-Torque (68-93); Spindependent Transport (94-108)
MA 40.31: Poster
Freitag, 27. März 2009, 11:00–14:00, P1A
Correlation of magnetic properties of electrodeposited Fe nanowires with deposition conditions and morphology — Veronika Hähnel1,2, •Heike Schlörb1, Sebastian Fähler1, and Ludwig Schultz1,2 — 1IFW Dresden, P.O. Box 270116, 01171 Dresden, Germany — 2TU Dresden, Faculty of Mechanical Engineering, Institute of Material Science, 01062 Dresden, Germany
Periodic arrays of magnetic nanowires deposited in self-organised nanoporous templates have recently attracted much attention in fundamental and applied research. Scientific interest focuses on these low dimensional nanostructures, as significant changes in terms of chemical and physical properties compared to bulk material are expected.
In this study Fe nanowires were deposited using DC voltage into a nanoporous aluminum oxide membrane with a pore diameter of 70 nm and an interpore distance of 110 nm. By adjusting the deposition time the wire length was varied up to 10 µm. With increasing length we observe that the axis perpendicular to the wire axis becomes the magnetically hard axis due to shape anisotropy. In addition, two different slopes are observed in magnetisation curves measured along the wire axis for long wires. Since this behaviour is not expected for isolated wires, it is discussed with respect to magnetostatic interactions favouring an antiferromagnetic alignment of neighbouring wires.
As these features are only observed for wires having a smooth morphology, the influence of varied deposition conditions like potential, Fe2+ concentration and the electrolyte composition (e.g. adding H3BO3) on morphology and magnetic properties is analysed in detail.