K. Verbist et al., INCLUSIONS IN MAGNETRON-SPUTTERED YBA(2)CU(3-X)M(X)O(7-DELTA) THIN-FILMS - A STUDY BY MEANS OF ELECTRON-MICROSCOPY, Microscopy microanalysis microstructures, 7(1), 1996, pp. 17-25
The microstructure of (001) YBa2Cu3O7-delta and YBa(2)Cu(3-x)M(x)O(7-d
elta) (M = Zn or Fe) thin films grown by inverted cylindrical magnetro
n sputtering was investigated by means of electron microscopy. The imp
erfections present in the films are discussed. Special attention is pa
id to nanoscale Y2O(3) inclusions. The density of [001] Y2O3 precipita
tes was studied in YBa2Cu3-xZnxO7-delta and YBa2Cu3-xFexO7-delta thin
films prepared under identical conditions. The density decreases for i
ncreasing Zn-content and is unaffected in case of Fe-substitution.