Functional oxides screening: CoO and LaCoO3.

The pristine state structural characterization of a CoO bulk crystal as received from manufacturer will be done at the hard X ray Microscope in ID06. This sample of 4x4x0.05 mm will be examined in the direct beam, in reflection and in transmission. Goal: provide a full characterization of the cubic phase. Strain relaxation trough point defects in multilayered systems. LaCoO3/SrTiO3 multi-layers will be examined. We expect to observe strain relaxation through point defects. This system will be observed in reflection conditions. The films grown by MBE should present a low defect concentration. Two stacks are to be analyzed where the thicknesses of the layers of LCO and STO vary.