X-ray magnetic circular dichroism study of uranium/iron multilayers

F. Wilhelm, N. Jaouen, A. Rogalev, W. G. Stirling*, R. Springell, S. W. Zochowski, A. M. Beesley, S. D. Brown, M. F. Thomas, G. H. Lander, S. Langridge, R. C. C. Ward, M. R. Wells

*Corresponding author for this work

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

25 Citations (Scopus)

Abstract

X-ray magnetic circular dichroism (XMCD) measurements were performed at the U M(4,5) edges and Fe K edge on well-defined uranium/iron multilayers with different compositions. The multilayers have layer thicknesses in the range 9-40 A for uranium and 9-34 A for iron. At both 10 K and room temperature, the U layers are magnetically polarized in all of the multilayers studied. To deduce the magnetic moment on the uranium from the XMCD results requires assumptions about the magnetic dipole operator <T(Z)> in the analysis, and this is discussed in detail. Given the most likely scenario of strong hybridization between the U 5f and Fe 3d states, the largest value of the induced U moment is similar to 0.12 mu(B), which is located primarily at the interface and oscillates within the uranium layer.

Original languageEnglish
Article number024425
Number of pages12
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume76
Issue number2
DOIs
Publication statusPublished - Jul 2007

Keywords

  • INTERMETALLIC COMPOUND UFE2
  • SELF-ABSORPTION
  • ORBITAL-MOMENT
  • GROUND-STATE
  • ALLOYS
  • REFLECTIVITY
  • ANISOTROPY
  • FILMS
  • FERROMAGNETISM
  • TEMPERATURE

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