Fig. 2
Structure and near-surface composition of (LaMnO3)2/(SrMnO3) heterostructures. a X-ray diffraction patterns of (LaMnO3)2/(SrMnO3) films. Peaks near 23° can be assigned to the (001) pseudo-cubic perovskite structure and the substrate peak (003 and *, respectively). The peaks near 14° and 7° are assigned to the satellite reflections of the superlattice (−1 and −2) from the cation ordering. b Ambient pressure X-ray photoelectron spectroscopy measurement of the La/Sr intensity ratio of the (LaMnO3)2/(SrMnO3) heterostructures at different oxygen pressures. LaMnO3-LaMnO3-LaMnO3 is referred to as “LLL”, LaMnO3-LaMnO3-SrMnO3 as “LLS”, LaMnO3-SrMnO3-LaMnO3 as “LSL”, and SrMnO3-LaMnO3-LaMnO3 as “SLL”
