Optimizing a low-energy electron diffraction spin-polarization analyzer for imaging of magnetic surface structures

Publication type:
Journal article
Metadata:
Autoren
  • Robert Froemter
  • Sebastian Hankemeier
  • Hans Peter Oepen
  • Juergen Kirschner
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000289149600039&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1063/1.3534832
eISSN
1089-7623
Externe Identifier
  • Clarivate Analytics Document Solution ID: 745EV
  • PubMed Identifier: 21456748
ISSN
0034-6748
Ausgabe der Veröffentlichung
3
Zeitschrift
REVIEW OF SCIENTIFIC INSTRUMENTS
Artikelnummer
ARTN 033704
Datum der Veröffentlichung
2011
Status
Published
Titel
Optimizing a low-energy electron diffraction spin-polarization analyzer for imaging of magnetic surface structures
Sub types
  • Article
Ausgabe der Zeitschrift
82

Data source: Web of Science (Lite)

Other metadata sources:
Abstract
<jats:p>A newly designed scanning electron microscope with polarization analysis (SEMPA or spin-SEM) for the acquisition of magnetic images is presented. Core component is the spin detector, based on the scattering of low-energy electrons at a W(100) surface in ultrahigh vacuum. The instrument has been optimized with respect to ease of handling and efficiency. The operation and performance of a general low-energy electron diffraction (LEED) detector for SEMPA have been modeled in order to find the optimum operating parameters and to predict the obtainable image asymmetry. Based on the energy dependence of the secondary electron polarization and intensity, the detector output is simulated. For our instrument with optimized performance we demonstrate experimentally 8.6% polarization asymmetry in the domain structure of an iron whisker. This corresponds to 17.2% image contrast, in excellent agreement with the predicted simulated value. A contrast to noise ratio of 27 is achieved at 5 ms acquisition time per pixel.</jats:p>
Autoren
  • Robert Frömter
  • Sebastian Hankemeier
  • Hans Peter Oepen
  • Jürgen Kirschner
DOI
10.1063/1.3534832
eISSN
1089-7623
ISSN
0034-6748
Ausgabe der Veröffentlichung
3
Zeitschrift
Review of Scientific Instruments
Sprache
en
Online publication date
2011
Datum der Veröffentlichung
2011
Status
Published
Herausgeber
AIP Publishing
Herausgeber URL
http://dx.doi.org/10.1063/1.3534832
Datum der Datenerfassung
2023
Titel
Optimizing a low-energy electron diffraction spin-polarization analyzer for imaging of magnetic surface structures
Ausgabe der Zeitschrift
82

Data source: Crossref

Abstract
A newly designed scanning electron microscope with polarization analysis (SEMPA or spin-SEM) for the acquisition of magnetic images is presented. Core component is the spin detector, based on the scattering of low-energy electrons at a W(100) surface in ultrahigh vacuum. The instrument has been optimized with respect to ease of handling and efficiency. The operation and performance of a general low-energy electron diffraction (LEED) detector for SEMPA have been modeled in order to find the optimum operating parameters and to predict the obtainable image asymmetry. Based on the energy dependence of the secondary electron polarization and intensity, the detector output is simulated. For our instrument with optimized performance we demonstrate experimentally 8.6% polarization asymmetry in the domain structure of an iron whisker. This corresponds to 17.2% image contrast, in excellent agreement with the predicted simulated value. A contrast to noise ratio of 27 is achieved at 5 ms acquisition time per pixel.
Addresses
  • Institut für Angewandte Physik, Universität Hamburg, Jungiusstr. 11, 20355 Hamburg, Germany. rfroemte@physik.uni-hamburg.de
Autoren
  • Robert Frömter
  • Sebastian Hankemeier
  • Hans Peter Oepen
  • Jürgen Kirschner
DOI
10.1063/1.3534832
eISSN
1089-7623
Externe Identifier
  • PubMed Identifier: 21456748
Open access
false
ISSN
0034-6748
Ausgabe der Veröffentlichung
3
Zeitschrift
The Review of scientific instruments
Sprache
eng
Medium
Print
Paginierung
033704
Datum der Veröffentlichung
2011
Status
Published
Datum der Datenerfassung
2011
Titel
Optimizing a low-energy electron diffraction spin-polarization analyzer for imaging of magnetic surface structures.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
82

Data source: Europe PubMed Central

Abstract
A newly designed scanning electron microscope with polarization analysis (SEMPA or spin-SEM) for the acquisition of magnetic images is presented. Core component is the spin detector, based on the scattering of low-energy electrons at a W(100) surface in ultrahigh vacuum. The instrument has been optimized with respect to ease of handling and efficiency. The operation and performance of a general low-energy electron diffraction (LEED) detector for SEMPA have been modeled in order to find the optimum operating parameters and to predict the obtainable image asymmetry. Based on the energy dependence of the secondary electron polarization and intensity, the detector output is simulated. For our instrument with optimized performance we demonstrate experimentally 8.6% polarization asymmetry in the domain structure of an iron whisker. This corresponds to 17.2% image contrast, in excellent agreement with the predicted simulated value. A contrast to noise ratio of 27 is achieved at 5 ms acquisition time per pixel.
Autoren
  • Robert Frömter
  • Sebastian Hankemeier
  • Hans Peter Oepen
  • Jürgen Kirschner
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/21456748
DOI
10.1063/1.3534832
eISSN
1089-7623
Ausgabe der Veröffentlichung
3
Zeitschrift
Rev Sci Instrum
Sprache
eng
Country
United States
Paginierung
033704
Datum der Veröffentlichung
2011
Status
Published
Datum, an dem der Datensatz öffentlich gemacht wurde
2011
Titel
Optimizing a low-energy electron diffraction spin-polarization analyzer for imaging of magnetic surface structures.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
82

Data source: PubMed

Beziehungen:
Property of

Tools