Fe Nanoclusters on the Ge（001） Surface Studied by Scanning Tunneling Microscopy, Density Functional Theory Calculations and X-Ray Magnetic Circular Dichroism

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. Dependin...

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Published in:纳米研究：英文版 2011, Vol.4 (10), p.971-978
Main Author: Olaf LUbben Sergey A. Krasnikov Alexei B. Preobrajenski Barry E. Murphy Igor V. Shvets
Format: Article
Language:English
Subjects:
DFT计算
X射线
密度泛函理论
扫描隧道显微镜
磁性圆二色
纳米团簇
表面
铁团簇
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creator Olaf LUbben Sergey A. Krasnikov Alexei B. Preobrajenski Barry E. Murphy Igor V. Shvets
description 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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subjects DFT计算
X射线
密度泛函理论
扫描隧道显微镜
磁性圆二色
纳米团簇
表面
铁团簇
title Fe Nanoclusters on the Ge（001） Surface Studied by Scanning Tunneling Microscopy, Density Functional Theory Calculations and X-Ray Magnetic Circular Dichroism
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