Fig. 13

High-resolution Z-contrast image of a LCMO/YBCO/LCMO trilayer, obtained at 100 kV. b EELS linescan acquired along the direction marked with an arrow in (a). Principal component analysis (PCA) has been used to remove random noise. c Sample spectrum extracted from the linescan in (b), acquisition time is 2 s per spectrum. The data points are a raw spectrum while the red line is the same dataset after PCA. Reproduced from Varela et al. 2012. Copyright 2012 Oxford University Press