TY - JOUR
T1 - Enhancement of current carrying capability in MOD-processed YBCO films using chemical doping
AU - Ghalsasi, S. V.
AU - Zhou, Y. X.
AU - Rusakova, I.
AU - Sun, Y. Y.
AU - Salama, K.
N1 - Funding Information:
Manuscript received August 29, 2006. This work was supported by the Texas Center for Superconductivity at Houston, Houston, TX USA. S. V. Ghalsasi, Y. X. Zhou and K. Salama are with the Department of Mechanical Engineering, University of Houston, Houston, TX USA (e-mail: [email protected]; [email protected]; [email protected]). I. Rusakova and Y. Y. Sun are with the Department of Physics, University of Houston, Houston, TX USA. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2007.898871
PY - 2007/6
Y1 - 2007/6
N2 - Many efforts have been made to improve the current carrying capability of Y1Ba2Cu3O7 (YBCO) films by introducing pinning centers using a variety of techniques. In this study, we have succeeded in producing Y2O3, BaZrO3 and Sm doped YBCO films for the development of coated conductors by a metal-organic deposition method using trifluoroacetates (TFA-MOD). Jc exceeding 5 MA/cm 2 at 77 K and self field was obtained in Y2O3 doped YBCO film. Also it was found that YBCO films with Sm substituting for Y have shown an improved critical current density characteristic over a wide range of magnetic fields. A Jc of 0.25 MA/cm3 at 3 T and 77 K was obtained which is more than 10% of the zero-field Jc. Similar results were obtained in BaZrO3 doped YBCO films. Additionally, TEM analysis was performed to study the microstructures and the pinning mechanisms. The results indicate that significant enhancement of self-field and in-field Jc of Y2O 3, BaZrO3 and Sm doped YBCO films may be due to Introducing nano-scaled Y2 O3 particles, nano-scaled 90° rotated Y1/3Sm2/3Ba2Cu 3O7 domains and BaZrO3 nanodots by different chemical doping, respectively. This indicates that chemical doping is a promising approach for enhancement of current carrying capability of YBCO coated conductors.
AB - Many efforts have been made to improve the current carrying capability of Y1Ba2Cu3O7 (YBCO) films by introducing pinning centers using a variety of techniques. In this study, we have succeeded in producing Y2O3, BaZrO3 and Sm doped YBCO films for the development of coated conductors by a metal-organic deposition method using trifluoroacetates (TFA-MOD). Jc exceeding 5 MA/cm 2 at 77 K and self field was obtained in Y2O3 doped YBCO film. Also it was found that YBCO films with Sm substituting for Y have shown an improved critical current density characteristic over a wide range of magnetic fields. A Jc of 0.25 MA/cm3 at 3 T and 77 K was obtained which is more than 10% of the zero-field Jc. Similar results were obtained in BaZrO3 doped YBCO films. Additionally, TEM analysis was performed to study the microstructures and the pinning mechanisms. The results indicate that significant enhancement of self-field and in-field Jc of Y2O 3, BaZrO3 and Sm doped YBCO films may be due to Introducing nano-scaled Y2 O3 particles, nano-scaled 90° rotated Y1/3Sm2/3Ba2Cu 3O7 domains and BaZrO3 nanodots by different chemical doping, respectively. This indicates that chemical doping is a promising approach for enhancement of current carrying capability of YBCO coated conductors.
UR - https://www.scopus.com/pages/publications/34547451087
UR - https://www.scopus.com/pages/publications/34547451087#tab=citedBy
U2 - 10.1109/TASC.2007.898871
DO - 10.1109/TASC.2007.898871
M3 - Article
AN - SCOPUS:34547451087
SN - 1051-8223
VL - 17
SP - 3343
EP - 3346
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2
ER -