Bulk and surface valence in YbPd/sub x/ compounds

Journal Article · Sun Dec 15 04:00:00 EST 1985 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.32.8002· OSTI ID:6351105

Domke, M; Laubschat, C; Sampathkumaran, E V; Prietsch, M; Mandel, T; Kaindl, G; Middelmann, H U

The bulk and surface valence v-bar of Yb is investigated for YbPd/sub x/ intermetallic compounds (with x = 1,1.33,3) by photoemission using synchrotron radiation. YbPd is found to be of intermediate valence (v-barapprox. =2.75), while Yb/sub 3/Pd/sub 4/ and YbPd/sub 3/ are identified as bulk trivalent systems. The outermost atomic surface layer of both YbPd and Yb/sub 3/Pd/sub 4/ is found to be divalent, while only a fraction of Yb surface atoms turns divalent in YbPd/sub 3/. The results are compared with bremsstrahlung isochromat spectroscopy measurements and predictions based on Miedema's scheme.

• Research Organization: Institut fuer Atom- und Festkoerperphysik, Freie Universitaet Berlin, D-1000 Berlin 33, West Germany
• OSTI ID: 6351105
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 32:12; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
BREMSSTRAHLUNG
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
INTERMETALLIC COMPOUNDS
METALS
PALLADIUM
PHOTOELECTRON SPECTROSCOPY
PLATINUM METALS
RADIATIONS
RARE EARTH ALLOYS
SPECTROSCOPY
SYNCHROTRON RADIATION
TRANSITION ELEMENTS
ULTRAHIGH VACUUM
VALENCE
YTTERBIUM ALLOYS