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Recent Developments in Scanning Tunneling Microscopy

100%
Wiesendanger R.
Acta Physica Polonica A
|
1993
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vol. 84
|
issue 3
419-421
EN
Scanning tunneling microscopy and related local probe methods have led to a novel perception of nanometer- and atomic-scale structures and processes. Since the structural information is obtained directly in real space, the scanning probe techniques offer considerable advantages compared with diffraction techniques for the investigation of non-periodic structures at solid surfaces. In addition, the local probe methods allow to study almost any kind of physical property of microstructures with submicron down to atomic resolution.
2
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Surface Electronic Properties of Fe Nanoparticles on c(2×2)-N/Cu(001)

51%
Getzlaff M., Bode M., Wiesendanger R.
Acta Physica Polonica A
|
2003
|
vol. 104
|
issue 3-4
327-335
EN
We prepared nanoscaled particles consisting of ferromagnetic material on a nanostructured template. This nanolithographic procedure allows to fabricate high-density magnetic nanodots in a highly ordered way. For this purpose, Fe particles were grown on the c(2×2)-N/Cu(001) surface which exhibits a checkerboard-like structure. Scanning tunneling spectroscopic measurements demonstrate that the electronic properties of the areas with deposited material are identical to clean copper. Fe nanoparticles on the reconstructed patches show a significantly different electronic behavior. These observations directly hint to a covering of iron with copper on the clean surface.
3
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Surface State of Gd(0001) Films on W(110): Scanning Tunneling Spectroscopy Study

51%
Bode M., Pascal R., Getzlaff M., Wiesendanger R.
Acta Physica Polonica A
|
1998
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vol. 93
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issue 2
273-280
EN
The surface electronic structure of Gd(0001)/W(110) has been studied by scanning tunneling spectroscopy in dependence of the coverage. An exchange split d_{z^{2}}-like surface state which is well known from photoemission experiments was already found for coverages as low as 2 ML. The exchange splitting was found to increase with increasing coverage up to the fourth ML. For higher coverages the electronic structure remains constant. We found spectra that are shifted by ≈ 25 meV, possibly due to stacking faults.
4
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Spin-Polarized STM Investigation of Magnetic Domain Walls

45%
Kubetzka A., Pietzsch O., Bode M., Ravlić R., Wiesendanger R.
Acta Physica Polonica A
|
2003
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vol. 104
|
issue 3-4
259-268
EN
The potential of spin-polarized scanning tunneling microscopy and spectroscopy for the investigation of magnetism at the nanometer scale is demonstrated by focusing on magnetic domain walls. After reviewing different measurement modes it is shown that in addition to wall widths and positions the determination of their exact profiles provides further insight into the samples' magnetic properties.
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