Y2O3 nanoprecipitates in YBCO thin films obtained by thermal- MOCVD

J Santiso (1) , A Figueras (1) , Sylvie Schamm-Chardon (2) , C Grigis (2) , Dominique Dorignac (2) , Jean Sévely (2)

1 ICMAB - Institut de Ciència de Materials de Barcelona
2 CEMES - Centre d'élaboration de matériaux et d'études structurales

Disk-shaped Y2O3 nanoprecipitates were observed to appear systematically in Ba-deficient YBa2Cu3O7 (YBCO) films obtained by thermal MOCVD. These disks have an average size of 30nm in diameter and 4nm thick, and face parallel to the (001) YBCO planes. The observation by HREM reveals the epitaxial growth of the Y2O3 inclusions without affecting the stacking sequence of the surrounding YBCO matrix.

Domaines: Physique [physics]

J Santiso, A Figueras, Sylvie Schamm-Chardon, C Grigis, Dominique Dorignac, et al.. Y2O3 nanoprecipitates in YBCO thin films obtained by thermal- MOCVD. Physica C: Superconductivity and its Applications, 1994, 235, pp.619-620. ⟨10.1016/0921-4534(94)91533-4⟩. ⟨hal-01745068⟩