AVS 46th International Symposium
    Magnetic Interfaces and Nanostructures Technical Group Tuesday Sessions
       Session MI-TuA

Paper MI-TuA2
Underlying Simplicity of Magnetic Dichroism in the Photoelectron Spectroscopy of Gd

Tuesday, October 26, 1999, 2:20 pm, Room 618/619

Session: Magnetic Spectroscopies
Presenter: J.G. Tobin, Lawrence Livermore National Laboratory
Authors: J.G. Tobin, Lawrence Livermore National Laboratory
S.R. Mishra, Lawrence Livermore National Laboratory
T.R. Cummins, University of Missouri, Rolla
G.D. Waddill, University of Missouri, Rolla
G. van der Laan, Daresbury Laboratory, UK
Correspondent: Click to Email
Despite severe complexity in the 'raw' spectra of the Gd 5p's, the linear dichroic differences from remanently magnetized Gd/Y exhibit a startling underlying simplicity and consistency. The Gd 5p peaks display a strong cross sectional increase due to 'resonant photoemission' in the photon energy range of 135 to 150 eV. To properly model the pairs of 'raw' spectra acquired in linear dichroism experiments, an atomic model including multielectronic effects such as orbital momentum coupling is required. [1] However, the difference spectra obtained from the pairs are remarkably simple and consistent, in both experiment and atomic simulations. The development of a simplified one-electron picture to analyze the dichroic differences will also be discussed. S.R. Mishra, T.R. Cummins, G. D. Waddill, W.J. Gammon, G. van der Laan, K.W. Goodman, and J.G. Tobin, 'On the Nature of Resonant Photoemission in Gd,' Phys. Rev. Lett., 81, 1306 (1998).