Effects of Implanted Fe+ Fluences on the Growth and Magnetic Properties of Surface Nanoclusters
We have fabricated surface magnetic iron nanoclusters using low energy Fe+ implantation and electron beam annealing. We find that changing the fluence has a significant effect on the nanocluster growth, structural and magnetic properties. Low fluences lead to small nanoclusters and superparamagnetism, while high fluences result in larger chain-like nanoclusters that have high remnant magnetizations and a significantly reduced saturation field. Our results show that the nanostructure and the magnetic properties can be tuned by varying the Fe+ fluence, which means that a reliable method can be used to make surface nanoclusters for a variety of applications (e.g. large magnetoresistance sensors with no hysteresis).
B. J. Ruck and T. Kemmitt
J. Leveneur et al., "Effects of Implanted Fe+ Fluences on the Growth and Magnetic Properties of Surface Nanoclusters", Materials Science Forum, Vol. 700, pp. 37-40, 2012