Oxygen diffusion in epitaxial Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} thin films

Superconducting Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} thin films ({Tc}{approximately}85K) were prepared on off-c-axis (001) SrTiO{sub 3}, substrates by pulsed laser deposition. High quality oriented film growth with a c-axis inclined with respect to the surface normal by a tilt angle {alpha} is found up to {alpha} {approximately} 15{degree} from SEM, XRD and resistivity measurements. Isothermal oxygen diffusion is monitored by in-situ electrical resistance measurements at temperatures ranging from 200 C--400 C. From the temporal evolution of the resistance the in-plane diffusion constant D{sub ab} is determined.