Nanotips and nanosources: application to low-energy-electron microscopy

The characteristics of e-beams held emitted from nanotips, which are atom-sources of electrons, were analysed experimentally for non-magnetic and ferromagnetic nanotips. Their specific characteristics are fully exploited in a versatile low-energy electron projection microscope: the Fresnel projection microscope. Observations of nanometric fibres of carbon and of organic materials were performed with working voltages around 200 V. The images show, in the direct space, details of the objects of less than 1 nm without any magnetic shielding.

Microscopy ◽  
2005 ◽  
Vol 54 (2) ◽  
pp. 109-117 ◽  
Author(s):  
Kenji Matsuda ◽  
Susumu Ikeno ◽  
Ilona Müllerová ◽  
Luděk Frank

1993 ◽  
Vol 313 ◽  
Author(s):  
Helmut Poppa ◽  
Heiko Pinkvos ◽  
Karsten Wurm ◽  
Ernst Bauer

ABSTRACTIn-situ recording of ultra-thin film growth by Low Energy Electron Microscopy (LEEM) results in accurate determinations of monolayer metal deposition rates for difficult to calibrate deposition geometries. Deposition rates and growth features were determined for Cu and Co on W (110) allowing for thickness control at the submonolayer level. Also, the transparencies of non-Magnetic overlayers of Pd (111) and Cu (111) to very low energy spin polarized electrons were compared and qualitatively explained by band structure considerations. Cu (111) is much more transparent than Pd (111) so that magnetic domain structures can be observed through at least 4 nmof Cu (111). This suggests the use of Cu (111) and other metals of suitable band structure as protective layers for surface magnetic studies.


2015 ◽  
Vol 118 (5) ◽  
pp. 055701 ◽  
Author(s):  
Michael Rienäcker ◽  
Benjamin Borkenhagen ◽  
Gerhard Lilienkamp ◽  
Winfried Daum

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