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    • Keywords


      Photoemission spectra; ESCA; XPS; rare earth intermetallics; valence fluctuation

    • Abstract


      ESCA (or XPS) studies of some rare-earth intermetallics were carried out using ESCA (3) Mark II and ‘ESCALAB’ machines from V G Scientific. The mixed valence nature of EuCu2Si2 and EuNi2P2 intermetallic compounds has been established. The 3d core-level photoemission spectra of Eu in EuCu2Si2 and EuNi2P2 exhibit two sets of structures corresponding to two different valence states of the rare-earth ions. Each of these sets shows simple spin-orbit splitting. The replicate splitting measured by us agrees well with those calculated by Herbst and Wilkins. The 3d core-level photoemission spectra of Eu is free from the multiplet splitting and satellite structure. The importance of 3d core-level photoemission studies in the understanding of valence fluctuation phenomenon has been emphasized.

    • Author Affiliations


      B D Padalia1 Varsha Prabhawalkar1 P D Prabhawalkar1 E V Sampathkumaran1 2 L C Gupta1 2 R Vijayaraghavan1 2

      1. Department of Physics, Indian Institute of Technology, Bombay - 400 076, India
      2. Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay - 400 005, India
    • Dates

  • Bulletin of Materials Science | News

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