作者： D. Imhoff , C. Colliex , F. Pailloux , J.-P. Contour , J.-L. Maurice
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摘要: The aim of the present work is an atomic scale characterization SrTiO 3 /La 2 / Sr 1 MnO interface involved in Co/SrTiO tunnel junctions. Our high-resolution transmission electron microscopy experiments show quality pseudo-morphic growth La (LSMO) and (STO), but do not allow us to determine termination LSMO. On other hand, we have carried out energy-loss near-edge structure study Mn p O s edges. main result that valence keeps its intrinsic value bulk material till last layers at interface, which consistent with observation magnetoresistance up practically Curie temperature LSMO our These results suggest a