Polarization of U 5f states in uranium multilayers

R. Springell*, F. Wilhelm, A. Rogalev, W. G. Stirling, R. C. C. Ward, M. R. Wells, S. Langridge, S. W. Zochowski, G. H. Lander

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

9 Citations (Scopus)

Abstract

X-ray magnetic circular dichroism (XMCD) measurements were performed at the U M(4,5) edges for U/Fe, U/Co, U/Ni, and U/Gd multilayers. In the case of the U/Fe system, a significant polarization of the U 5f electrons was found, but not for U/Co or U/Ni multilayers. We ascribe this to a hybridization of U 5f and Fe 3d states, which overlap in energy near the Fermi level. In the U/Gd system, the XMCD signals were small and yielded magnetic moments of order 0.02 mu(B). The spatial extent of the U 5f polarization is different from that of the U/Fe system and is oscillatory, extending into the center of the U layers.

Original languageEnglish
Article number064423
Number of pages6
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume77
Issue number6
DOIs
Publication statusPublished - Feb 2008

Keywords

  • MAGNETIC CIRCULAR-DICHROISM
  • ELECTRONIC-STRUCTURE
  • SELF-ABSORPTION
  • SUPERLATTICES
  • REFLECTIVITY
  • US

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