AVS 58th Annual International Symposium and Exhibition
    Actinides and Rare Earths Focus Topic Wednesday Sessions
       Session AC+MI-WeA

Paper AC+MI-WeA8
Hard X-Ray Photoelectron Spectroscopy and Electronic Structure of Single Crystal UPd3, UGe2, and USb2

Wednesday, November 2, 2011, 4:20 pm, Room 209

Session: Magnetic and Electron Correlation Effects in Actinides and Rare Earths
Presenter: Miles Beaux, Los Alamos National Laboratory
Authors: M.F. Beaux, Los Alamos National Laboratory
T. Durakiewicz, Los Alamos National Laboratory
J.J. Joyce, Los Alamos National Laboratory
E.D. Bauer, Los Alamos National Laboratory
J.L. Sarrao, Los Alamos National Laboratory
L. Moreschini, Ecole Polytechnique Federale, Switzerland
M. Grioni, Ecole Polytechnique Federale, Switzerland
F. Offi, Universita Roma Tre, Italy
M.T. Butterfield, KLA-Tencor
G. Monaco, European Synchrotron Radiation Facility, France
G. Panaccione, Laboratorio Nazionale TASC-INFM-CNR, Italy
E. Guziewicz, Polish Academy of Sciences
Correspondent: Click to Email
Hard X-ray Photoelectron Spectroscopy (HAXPES) with 7.6 keV photons has been performed on single crystals of UPd3, UGe2, and USb2 at the European Synchrotron Radiation Facility (ESRF). The greatly reduced surface sensitivity of HAXPES enabled observation of the bulk core levels in spite of surface oxidation. An 800 meV splitting within the Sb 3d core level was observed. The splitting of the Sb core levels is attributed to manifestations of two distinct Sb binding sites within the USb2 single crystal as supported by consideration of interatomic distances and enthalpy-of-formation. Photoelectron mean-free-path vs oxide layer thickness considerations were used to model the effectiveness of HAXPES for probing bulk features of in-air cleaved samples.