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Effects of Implanted Fe+ Fluences on the Growth and Magnetic Properties of Surface Nanoclusters

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Abstract:

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).

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Periodical:

Materials Science Forum (Volume 700)

Pages:

37-40

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.700.37

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Online since:

September 2011

Authors:

Jérôme Leveneur, John Kennedy, Grant V. M. Williams, Fang Fang, James B. Metson, Andreas Markwitz

Keywords:

Electron Beam Annealing, Ion Beam Synthesis, Magnetic Nanoclusters, Superparamagnetism

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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