Abstract-Gd1+xBa2-xCu 3Or7(GdBCO) coated conductors on Ion-beam assisted deposition (IBAD)-MgO templates were grown by pulsed laser deposition (PLD). Growth conditions for the PLD of high quality of GdBCO turn out to have a rather larger range than for Nd-based cuprate thin films. The structural properties and critical current of GdBCO have been measured. The GdBCO layers show ∼100 A/cm at 0.5 micron-thick films. In our measurement of Raman scattering spectroscopy from 180 ∼ 1,200 cm-1, one strong B1g mode and two strong modes were observed. The high critical-current is ascribed to well-grown highly textured 123-structure without cation disorder and oxygen deficiency. It is notable that the GdBCO films do not have second phases like, Baco2 which is a signature liquid phase-based material that occurs in other rare-earth based cuprates.
Bibliographical noteFunding Information:
Manuscript received August 25, 2008. First published June 30, 2009; current version published July 15, 2009. This work was supported by a grant from the Center for Applied Superconductivity Technology of the 21st Century Frontier R&D Program funded by the Ministry of Science and Technology, Republic of Korea.
- GdBCO coated conductors
- Raman spectroscopy
- Rare-earth based cuprates
- Superconducting properties