Abstract
The valence-band electronic structure of a single-crystal FePt 3 alloy in a paramagnetic phase has been investigated by photoemission spectroscopy using synchrotron radiation. A well-characterized (1 0 0) surface was carefully prepared in an ultrahigh vacuum chamber. A sharp truncated peak was clearly observed just below the Fermi level at photon energy of 190 eV (Pt Cooper minimum). This peak corresponds to the tail of Fe 3d minority-spin band and enhances its intensity around the X point in the Brillouin zone as is predicted by band calculation. Several broad peaks were also observed and their dispersion were in accord with the Brillouin zone.
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