Back to Search
Start Over
Long-time stability of a low-energy electron diffraction spin polarization analyzer for magnetic imaging.
- Source :
-
Review of Scientific Instruments . Feb2012, Vol. 83 Issue 2, p023708. 5p. 4 Graphs. - Publication Year :
- 2012
-
Abstract
- The time stability of a polarization analyzer that is used for imaging of magnetic structures in a scanning electron microscope with spin polarization analysis (spin-SEM or SEMPA) is investigated. The detector is based on the diffraction of low-energy electrons at a W(100) crystal at 104.5 eV (LEED detector). Due to the adsorption of hydrogen from residual gas, a change of the scattering conditions is found that causes an angular shift of the LEED beams as well as changes of intensity. The quality factor, which describes the efficiency of the detector in SEMPA application, however, is found to be almost constant up to a hydrogen coverage of θ ≈ 0.25. This gives stable working conditions within roughly 1 h at vacuum conditions of 10-10 mbar. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00346748
- Volume :
- 83
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Review of Scientific Instruments
- Publication Type :
- Academic Journal
- Accession number :
- 72107494
- Full Text :
- https://doi.org/10.1063/1.3685629