Structure, morphology and composition of natural junctions of Sr2RuO4-Sr3Ru2O7 eutectic crystals

A detailed study of morphological, compositional and structural aspects of Sr2RuO4-Sr3Ru2O7 eutectic crystals is reported. The stoichiometry of the phases that compose the crystals and how they are arranged in the crystals are studied. Understanding the behavior at the Sr2RuO4-Sr3Ru2O7 interface represents a necessary prerequisite for the analysis of the experimental results on the transport properties recently reported in the literature.