Surface stoichiometry of La0.7Sr0.3MnO3 during in vacuo preparation; A synchrotron photoemission study
We present a study of the surface stoichiometry and contamination of La0.7Sr0.3MnO3 thin films following exposure to air and subsequent in vacuo preparation. Samples were studied using both soft X-ray synchrotron photoemission (hv = 150 to 350 eV) and traditional Mg-K alpha XPS (hv = 1253.6 eV) whilst annealing incrementally to approximate to 510 degrees C in low pressures of O-2. In all cases, a