GaAs-Fe₃Si core-shell nanowires: nanobar magnets.

Hilse, Maria; Herfort, Jens; Jenichen, Bernd; Trampert, Achim; Hanke, Michael; Schaaf, Peter; Geelhaar, Lutz; Riechert, Henning · Nano Lett · 2013

basic_science · Level V

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Abstract

Semiconductor-ferromagnet GaAs-Fe3Si core-shell nanowires were grown by molecular beam epitaxy and analyzed by scanning and transmission electron microscopy, X-ray diffraction, Mössbauer spectroscopy, and magnetic force microscopy. We obtained closed and smooth Fe3Si shells with a crystalline structure that show ferromagnetic properties with magnetizations along the nanowire axis (perpendicular to the substrate). Such nanobar magnets are promising candidates to enable the fabrication of new forward-looking devices in the field of spintronics and magnetic recording.

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