Fe Nanoclusters on the Ge(001) Surface Studied by Scanning Tunnelling Microscopy, Density Functional Theory Calculations and X-Ray Magnetic Circular Dichroism
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2011Citation:
O. Lubben, SA Krasnikov, AB Preobrajenski, BE Murphy, IV Shvets, Fe Nanoclusters on the Ge(001) Surface Studied by Scanning Tunnelling Microscopy, Density Functional Theory Calculations and X-Ray Magnetic Circular Dichroism, Nano Research, 4, 10, 2011, 971 - 978Download Item:
Abstract:
The growth of Fe nanoclusters on the Ge(001) surface has been studied using low-temperature scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. STM results indicate that Fe nucleates on the Ge(001) surface, forming well-ordered nanoclusters of uniform size. Depending on the preparation conditions, two types of nanoclusters were observed having either four or sixteen Fe atoms within a nanocluster. The results were confirmed by DFT calculations. Annealing the nanoclusters at 420 K leads to the formation of nanorow structures, due to cluster mobility at such temperature. The Fe nanoclusters and nanorow structures formed on the Ge(001) surface show a superparamagnetic behaviour as measured by X-ray magnetic circular dichroism.
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Science Foundation Ireland (SFI)
07/RFP/MASF185
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http://people.tcd.ie/ivchvetshttp://people.tcd.ie/murphb36
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Nano Research4
10
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Ge(001), iron nanoclusters, self-assembly, STM, X-Ray Magnetic Circular Dichroism, Density Functional Theory calculationsSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1007/s12274-011-0153-6Metadata
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