Studies of the Oxygen Deficiency Effect in La1-xCaxMnOz Using X-ray Photoelectron Spectroscopy

Oxygen 1s photoelectron spectra have been measured for La1-x Ca x MnO z (LCMO) thin films. The results on the second peak shift and the separation of the peaks are discussed. The second peak shift indicates the oxygen increase causing magnetic transition. The separation of the peaks shows that the oxygen stoichiometry in the crystal is improved. This tendency confirms that the amount of activated oxygen increases with annealing temperature. It is considered that the oxygen 1s photoelectron spectra and the oxygen deficiency effect in resistivity measurements are significantly related.