X-ray photoelectron spectroscopy studies of Yb{sub 14}MnSb{sub 11} and Yb{sub 14}ZnSb{sub 11}
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616 (United States)
- Department of Physics, University of Missouri-Rolla, Rolla, MO 65401-0249 (United States)
- Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States)
Measurements of core and valence electronic states of single crystals of the rare earth transition metal Zintl phases Yb{sub 14}MnSb{sub 11} and Yb{sub 14}ZnSb{sub 11} were performed using the X-ray photoelectron spectroscopy station of Beamline 7 at the Advanced Light Source. Sample surfaces of Yb{sub 14}MnSb{sub 11} and Yb{sub 14}ZnSb{sub 11} were measured as received, after Ar{sup +} ion bombardment, and after cleaving in situ. The single crystal structure of Yb{sub 14}ZnSb{sub 11} is also reported. Both compounds are air-sensitive and show Yb{sup 3+} due to surface oxidation. In the case of Yb{sub 14}MnSb{sub 11}, there is no evidence for Yb{sup 3+} that would be intrinsic to the sample, consistent with previously reported X-ray magnetic circular dichroism studies. Detailed analyses of the Yb{sub 14}ZnSb{sub 11} surfaces reveal a significant contribution of both Yb{sup 3+} and Yb{sup 2+} 4f states in the valence band region. This result is predicted for the Zn analog by Zintl counting rules and support the mixed valency of Yb for Yb{sub 14}ZnSb{sub 11}. Further detailed analysis of the core and valence band structure of both Yb{sub 14}MnSb{sub 11} and Yb{sub 14}ZnSb{sub 11} is presented.
- OSTI ID:
- 20721695
- Journal Information:
- Journal of Solid State Chemistry, Vol. 178, Issue 1; Other Information: DOI: 10.1016/j.jssc.2004.07.009; PII: S0022-4596(04)00388-3; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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