2011
DOI: 10.1007/s12274-011-0153-6
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Fe nanoclusters on the Ge(001) surface studied by scanning tunneling microscopy, density functional theory calculations and X-ray magnetic circular dichroism

Abstract: The growth of Fe nanoclusters on the Ge(001) surface has been studied using lowtemperature scanning tunnelling microscopy (STM) and density functional theory (DFT) calculations. STM results indicate that Fe nucleates on the Ge(001) surface, forming wellordered 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 … Show more

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Cited by 5 publications
(4 citation statements)
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“…150 K. This indicates a superparamagnetic behavior of the Fe nanocluster arrays on Ge(001) similar to the one observed for the separated nanoclusters. 11 Furthermore, no magnetic hysteresis loop with remanence was observed at 150 K, in comparison to the ferromagnetic response of larger clusters and nanorods. 3,[15][16][17] This suggests that the nanocluster array size is still too small to provide a ferromagnetic response.…”
Section: Resultsmentioning
confidence: 97%
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“…150 K. This indicates a superparamagnetic behavior of the Fe nanocluster arrays on Ge(001) similar to the one observed for the separated nanoclusters. 11 Furthermore, no magnetic hysteresis loop with remanence was observed at 150 K, in comparison to the ferromagnetic response of larger clusters and nanorods. 3,[15][16][17] This suggests that the nanocluster array size is still too small to provide a ferromagnetic response.…”
Section: Resultsmentioning
confidence: 97%
“…1(a)). Each individual nanocluster consists of 16 Fe atoms 11 and its size is equal to 9 Å Â 9 Å . They have an apparent corrugation height of (1.1 6 0.1) Å , which does not depend on the bias voltage.…”
Section: Resultsmentioning
confidence: 99%
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“…The self-assembly of atoms or molecules into one-and two-dimensional surface-supported nanostructures is one of the key topics in surface science and nanotechnology [1][2][3][4][5][6]. This bottom-up approach has been widely employed over the past decade for the controlled formation of ordered molecular structures on surfaces, which can lead to mass fabrication of useable systems and novel molecule-based devices with different functionalities [6][7][8][9][10].…”
Section: Introductionmentioning
confidence: 99%