Three dimensional magnetic nanowires grown by focused electron-beam induced deposition

Control of the motion of domain walls in magnetic nanowires is at the heart of various recently proposed three-dimensional (3D) memory devices. However, fabricating 3D nanostructures is extremely complicated using standard lithography techniques. Here we show that highly pure 3D magnetic nanowires with aspect-ratios of ~100 can be grown using focused electron-beam-induced-deposition. By combining micromanipulation, Kerr magnetometry and magnetic force microscopy, we determine that the magnetisation reversal of the wires occurs via the nucleation and propagation of domain walls. In addition, we demonstrate that the magnetic switching of individual 3D nanostructures can be directly probed by magneto-optical Kerr effect

Three dimensional magnetic nanowires grown by focused electron-beam induced deposition

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.-- et al.Control of the motion of domain walls in magnetic nanowires is at the heart of various recently proposed three-dimensional (3D) memory devices. However, fabricating 3D nanostructures is extremely complicated using standard lithography techniques. Here we show that highly pure 3D magnetic nanowires with aspect-ratios of ∼100 can be grown using focused electron-beam-induced- deposition. By combining micromanipulation, Kerr magnetometry and magnetic force microscopy, we determine that the magnetisation reversal of the wires occurs via the nucleation and propagation of domain walls. In addition, we demonstrate that the magnetic switching of individual 3D nanostructures can be directly probed by magneto-optical Kerr effect.This research was supported by a Marie Curie Intra European Fellowship project No. 251698: 3DMAGNANOW, a Marie Curie International Outgoing Fellowship project no. 299376: HIGHSPIN and an ERC Advanced Grant project No. 247368: 3SPIN, all funded by the 7th European Community Framework Programme, by the MAT2011-27553-C02 project funded by the Spanish Ministry of Economy (including FEDER funding) and by the I-LINK0026 project funded by the Spanish CSIC.Peer Reviewe