Berlin 2012 – scientific programme

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MA: Fachverband Magnetismus

MA 38: MagneticThin Films I

MA 38.8: Talk

Thursday, March 29, 2012, 11:30–11:45, H 0112

Fe_100−xGa_x for magnetostrictive applications: from thin films to nanowires — •Diana Iselt¹, Alexander Funk^{1, 2}, Heike Schlörb¹, and Ludwig Schultz^{1, 2} — ¹IFW Dresden, Institute for Metallic Materials, P.O. Box 270116, 01171 Dresden, Germany — ²TU Dresden, Faculty of Mechanical Engineering, 01062 Dresden

Magnetostrictive materials are of high interest for electromagnetic sensing and actuating devices. A promising candidate to overcome the mechanical limitations of Terfenol-D is Fe_100−xGa_x with 15 to 25 at.% Ga, which exhibits high mechanical strength and low saturation fields. For sensor applications an efficient, scalable preparation routine is required for thin film and nanowire fabrication.

A suitable deposition process for Fe-Ga alloy thin films has been developed using electrochemical pulse plating [1]. By optimizing the deposition parameters such as electrolyte composition, deposition potential, deposition time and pulse sequences, homogeneous thin films with low oxygen content and tunable texture have been prepared. These deposition conditions are used to prepare highly ordered nanowires with high aspect ratios in nanoporous templates. Results of the structural and magnetic characterization of the nanowires will be presented and discussed.

[1] D. Iselt, U. Gaitzsch, S. Oswald, S. Fähler, L. Schultz, H. Schlörb, Electrochim. Acta 56 (2011) 5178.