In-plane stress effect on the electron-doped superconductor La1.89Ce0.11CuO4 thin films

(001)-oriented La1.89Ce0.11CuO4 (LCCO) thin films are deposited on (001) different substrates by pulsed laser deposition. A buffer layer BaTiO3 (BTO) is deposited with different thickness to produce various strains on LCCO. The electrical transport properties of LCCO are affected by the in-plane stress. Under the compressive stress, the superconducting transition temperature of LCCO is lower than that under tensile stress. It is attributed to the easier removal of the interstitial apical-oxygen in the film with tensile stress. (c) 2008 Elsevier B.V. All rights reserved.