Effects of SrTiO3 capping in La2/3Ca 1/3MnO3 electrodes of different orientations

Abstract

We report on the study of the structural, magnetic, and electronic properties of SrTi O3 capped La23 Ca13 Mn O3 electrodes grown on (001) and (110) SrTi O3 substrates. Magnetic properties of the (001) and (110) capped electrodes evolve differently when the capping layer thickness increases, revealing a reduction of the saturation magnetization for the (001) ones. Electronic properties are studied combining Mn55 nuclear magnetic resonance (NMR) and x-ray photoemission spectroscopy (XPS). NMR experiments highlight that electronic phase separation in the (001) electrodes is enhanced by the presence of the SrTi O3 capping layer and XPS measurements show that the electronic state of interfacial Mn ions from (001) electrode is more sensitive to the capping layer. © 2008 American Institute of Physics.