Electron-doped superconducting (La,Ce)2CuO4 thin films grown by dc magnetron sputtering and their transport properties

Electron-doped La2-xCexCuO4 (LCCO) thin films were successfully prepared on (100) SrTiO3 substrates by the dc magnetron sputtering method. The optimal-doped films show a highly c-axis oriented single T'-type structure, and the zero resistance temperature TC0 is 25 K. In the normal state, the nearly quadratic temperature dependence of the resistivity was found and attributed to the Landau-Fermi liquid behaviour due to electron-electron scattering. At the same time, the negative sign of the Hall coefficient for such films well above TC obviously confirms the electron-type nature. The optimal conditions for the growth of single-phase T'-type LCCO thin films are also discussed in detail