Title :
Characteristics of Ce-Zr mixed oxide films as buffer layer by controlling composition
Author :
Lee, H.Y. ; Kim, S.I. ; Lee, Y.C. ; Hong, Y.P. ; Ko, K.H.
Author_Institution :
Ajou Univ., Suwon, South Korea
fDate :
6/1/2003 12:00:00 AM
Abstract :
YSZ films have been widely used as buffer layers for high Tc superconductor. However, it is necessary to investigate and develop another buffer layer with suitable, simple, and neat processing. Films of Ce-Zr mixed oxide were deposited by rf and dc magnetron co-sputtering. In sputtering process, dc power of Zr was fixed in 200 W while rf power of Ce was varied with 30 W, 50 W, 100 W, respectively. As-deposited (CexZr1-x)O2 films were crystallized without post annealing. It was confirmed that the composition of the films could be controlled with controlling rf power of Ce target. The Φ scan of XRD showed that all (CexZr1-x)O2 films were [200] c-axis oriented. Three consecutive magnetron sputtering procedure for seed, CZO and cap layer for HTSC films using Ce, Zr and CeO2 target were carried out on the Si[100] and Ni substrate successfully. It is suggested that sputtered and c-axis oriented (CexZr1-x)O2 films can be a potential candidate to replacing YSZ buffer layer.
Keywords :
X-ray diffraction; annealing; cerium compounds; high-temperature superconductors; sputtered coatings; superconducting tapes; superconducting thin films; zirconium compounds; (CexZr1-x)O2; (CexZr1-x)O2 films; 100 W; 200 W; 30 W; 50 W; Ce-Zr mixed oxide films; Ni; Ni substrate; Si; Si[100] substrate; buffer layer; high temperature superconductor; magnetron co-sputtering; Buffer layers; Conductive films; High temperature superconductors; Lattices; Sputtering; Substrates; Superconducting epitaxial layers; Superconducting films; Superconducting magnets; Zirconium;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.811944
