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Magnetic Dichroism in Resonant Photoemission and Photoabsorption from Gd Metal

Published online by Cambridge University Press:  15 February 2011

K. Starke
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
G. Van Der Laan
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
Z. Hu
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
E. Arenholz
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
E. Navas
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
A Bauer
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
A. Mühlig
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
C. S- Langeheine
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
E. Weschke
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
J. Goodkoep
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
N. Brookes
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
G. Kaindl
Affiliation:
Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin-Dahlem, Germany, starke@physik.fii-berlin.de
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Abstract

We report on the study of MCD in resonant PE, using Gd metal as an example. When the photon energy is changed across the Gd 4d → 4ƒ excitation region, the PE-MCD spectrum varies substantially. Based on atomic-multiplet theory, we present a consistent picture of MCD in resonant 4d → 4ƒ PE and x-ray absorption at the 4d-edge, where all spectral changes can be explained by the angular-momentum of the intermediate absorption state. The present analysis shows: when tuning to a specific line of the 4d x-ray absorption spectrum with a total angular momentum J', only the associate multiplet component is found to resonate. At the ‘giant resonance’, the shape of the MCD-PE signal closely resembles the off-resonance case; this finding is explained within atomic-multiplet theory allowing a straightforward use of MCD in 4d-resonant PE (i) for element-specific analysis of multicomponent magnetic systems with high surface sensitivity and (ii) for surface-domain imaging by PE microscopy.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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References

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