Title :
CeO/sub 2/ buffer layers for YBCO: growth and processing via sol-gel technique
Author :
Celik, E. ; Schwartz, J. ; Avci, E. ; Schneider-Muntau, H.J. ; Hascicek, Y.S.
Author_Institution :
Nat. High Magnetic Field Lab., Tallahassee, FL, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
In this study, the processing and growth mechanisms of CeO/sub 2/ buffer layers were evaluated on Ni substrates for YBCO superconductor. The sol-gel technique was utilized to produce buffer layers from six different Ce based precursor materials. The microstructure, phase composition and formation of buffer layers were characterized by means of ESEM, SEM, EDS, XRD, pole figure XRD and DTA techniques. The results indicated that the CeO/sub 2/ formation starts at temperature of 420/spl deg/C. It was found that the best crack free CeO/sub 2/ thin films were obtained by using Ce(NO/sub 3/)/sub 3//spl middot/6H/sub 2/O and colloidal CeO/sub 2/ based precursor materials. Different anions and their concentrations also influenced the structure of thin films.
Keywords :
X-ray diffraction; cerium compounds; differential thermal analysis; insulating thin films; liquid phase deposited coatings; scanning electron microscopy; sol-gel processing; 420 C; CeO/sub 2/; CeO/sub 2/ buffer layers; DTA techniques; EDS; ESEM; Ni; Ni substrates; SEM,; XRD; YBCO; crack free CeO/sub 2/ thin films; formation; growth; microstructure; phase composition; pole figure XRD; processing; sol-gel technique; Buffer layers; Coatings; Nickel; Substrates; Superconducting epitaxial layers; Superconducting materials; Superconducting thin films; Temperature; X-ray scattering; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
