“…In order to compare the results of the Ca-doped NBCO films with those of the films grown from stoichiometric [21] and Ba-rich NBCO films [22,23], we chose the same experimental plan and procedure for analysis used for the growth of the stoichiometric and Ba-rich NBCO films, which involves just three growth parameters: substrate temperature (T ), oxygen pressure (p) and laser energy density (E). All three were set to three different levels to permit detection of quadratic effects, and the experimental plan chosen was again a Box-Behnken design [17,18].…”