Title :
Ion-beam assisted deposition of bi-axially aligned MgO template films for YBCO coated conductors
Author :
Groves, J.R. ; Arendt, P.N. ; Foltyn, S.R. ; DePaula, R.F. ; Peterson, E.J. ; Holesinger, T.G. ; Coulter, J.Y. ; Springer, R.W. ; Wang, C.P. ; Hammond, R.H.
Author_Institution :
Mater. Sci. Div., Los Alamos Nat. Lab., NM, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
We report the results of experiments with ion-beam-assisted deposition (IBAD) of MgO using in-situ monitoring with Reflected High-Energy Electron Diffraction (RHEED). Strips of polished Haynes 242 and Inconel 625 nickel-based super-alloys have been used as substrates for these experiments. The in-plane texture of the MgO, as measured by X-ray /spl phi/ scan, resulted in FWHM values between 11 and 15/spl deg/. Using pulsed-laser deposition, the IBAD MgO template films were then overcoated with buffer layer films and a final superconducting film of YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta//. The best superconducting transport properties measured on these YBCO films were: an Ic (75 K, self-field, 1 cm wide) of 41.6 A, and a narrow-bridge J/sub c/ (1.35 /spl mu/m thick film) of 0.46 MA/cm/sup 2/.
Keywords :
barium compounds; critical current density (superconductivity); high-temperature superconductors; ion beam assisted deposition; magnesium compounds; pulsed laser deposition; superconducting thin films; superconducting transition temperature; yttrium compounds; 1.35 mum; 75 K; MgO; RHEED; YBCO coated conductors; YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta//; YBa/sub 2/Cu/sub 3/O/sub 7/; bi-axially aligned MgO template films; high temperature superconductor; in-plane texture; ion-beam assisted deposition; pulsed-laser deposition; superconducting transport properties; Buffer layers; Electrons; Monitoring; Optical films; Strips; Substrates; Superconducting epitaxial layers; Superconducting films; Superconducting integrated circuits; X-ray diffraction;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
