期刊
JOURNAL OF APPLIED PHYSICS
卷 113, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4789988
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资金
- Deutsche Forschungsgemeinschaft [SFB762]
- University of Leipzig
- Cusanuswerk
- Bischofliche Studienforderung
We present and discuss element-specific x-ray photoelectron diffraction (XPD) patterns of La, Mn, O and the dopant ions Ca, Sr and Ce of various La0.7X0.3MnO (LXMO) films grown epitaxially on SrTiO3(001) substrates. The recorded XPD polar scans are explained in the framework of multiple-scattering cluster calculations, where in general a very good agreement between experimental and theoretical data has been found. Results for all thin films are compatible with a tetragonally distorted cubic perovskite structure with similar MnO6 network. Strong evidence for Mn-site termination was found in all thin films. Dopant locations on A-type sites were clearly confirmed for Sr in LSMO and Ca in LCMO films by means of XPD polar scans. The absence of surface-sensitive Ce3d diffraction features for Ce in LCeMO points to non-equivalent Ce sites and related near-surface disorder. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4789988]
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