R.F. Marks, R.A. Pollak, et al.
The Journal of Chemical Physics
We used high resolution (δE < 150 meV) photoemission with synchrotron radiation in the range 10 eV < hv < 130 eV to study archetypal mixed valent and related cerium-, samarium-, europium-, thulium- and ytterbium-based systems. Generally all mixed valent systems (except the cerium-based system which is not yet fully characterized) exhibit an integer valent surface layer which has the lower value of the two bulk valence configurations. Temperature-dependent changes in bulk valence were observed in the europium and samarium compounds. Mixed valence was observed to persist down to at least 5 at.% dilution of thulium in TmxY1-xSe while thulium appears to remain trivalent in all TmxY1-xS compounds studied. © 1983.
R.F. Marks, R.A. Pollak, et al.
The Journal of Chemical Physics
A. Cros, R.A. Pollak, et al.
Journal of Applied Physics
A. Cros, R.A. Pollak, et al.
Journal of Applied Physics
R.F. Marks, R.A. Pollak
The Journal of Chemical Physics