Influence of the shape and surface oxidation in the magnetization reversal of thin iron nanowires grown by focused electron beam induced deposition.

摘要: Iron nanostructures grown by focused electron beam induced deposition (FEBID) are promising for applications in magnetic sensing, storage and logic. Such require a precise design determination of the coercive field (H C), which depends on shape nanostructure. In present work, we have used Fe2(CO)9 precursor to grow iron nanowires FEBID thickness range from 10 45 nm width 50 500 nm. These exhibit an Fe content between 80 85%, thus giving high ferromagnetic signal. Magneto-optical Kerr characterization indicates that H C decreases increasing width, providing route control magnetization reversal through modification nanowire dimensions. Transmission microscopy experiments indicate these wires bell-type with surface oxide layer about 5 features decisive actual value as micromagnetic simulations demonstrate. results will help make appropriate designs FEBID.