The XRD patterns of LNO, LNO-Vo and LNO-Vo' are shown in Figure . The peak at 2θ = 46.4° corresponds to the (002) orientation of the 0.1% Nb-doped SrTiO3 single crystal substrate, while the peaks at 47.8°, 47.6° and 47.5° correspond to (002) oriented LNO, LNO-Vo and LNO-Vo', respectively. Well-defined oscillations are observed in both XRD and XRR plots for LNO, LNO-Vo, indicating high quality of these thin films.