Dependence of Phase, Lattice Constants, and Conductivity on the Composition and Annealing Conditions of T-La2-xYxCuOy Thin Film

We prepared T-La2-xYxCuOy thin film using the spin coating-pyrolysis method. We then investigated the relationship between the phase, lattice constants, and conductivity with the changing oxygen content using heat treatment. The lattice constant, c, decreased and conductivity increased with the decreasing PO2. Although the resistivity of most thin films decreased remarkably at less than 60 K, they did not exhibit zero resistivity.