Title :
Non-magnetic substrates for low cost YBCO coated conductors
Author :
Thieme, C.L.H. ; Annavarapu, S. ; Zhang, W. ; Prunier, V. ; Fritzemeier, L. ; Li, Q. ; Schoop, U. ; Rupich, M.W. ; Gopal, M. ; Foltyn, S.R. ; Holesinger, T.
Author_Institution :
American Supercond., Westborough, MA, USA
fDate :
3/1/2001 12:00:00 AM
Abstract :
CuNiAl and NiCr alloys were made and processed to non-magnetic, bi-axially textured substrates. Epitaxial YSZ and YBCO were deposited by pulsed laser deposition on the CuNiAl. Samples were cross sectioned and investigated with TEM. It appears that Al forms a thin oxide layer at the CuNiAl surface that acts as a template for the subsequent YSZ layer. The 1.2 μm YBCO layer had a current density of 0.16 MA/cm2 at 75 K and self field. On the NiCr substrates an Y2O3 seed layer was deposited with E-beam evaporation, followed by RF sputter deposition of YSZ and a CeO2 cap layer. These substrates were coated with a 0.4 μm YBCO layer using a trifluoroacetate solution, a very cost effective metal-organic deposition process. These samples carried critical currents exceeding 0.7 MA/cm2 at 77 K, self field
Keywords :
aluminium alloys; barium compounds; chromium alloys; copper alloys; critical current density (superconductivity); electron beam deposition; high-temperature superconductors; liquid phase deposition; nickel alloys; pulsed laser deposition; sputter deposition; substrates; superconducting tapes; transmission electron microscopy; yttrium compounds; 0.4 mum; 1.2 mum; 75 K; 77 K; CeO2; CeO2 cap layer; CuNiAl; E-beam evaporation; NiCr; RF sputter deposition; TEM; Y2O3; Y2O3 seed layer; Y2O3(ZrO2); YBCO; YBa2Cu3O7; bi-axially textured substrates; cost effective metal-organic deposition process; critical currents; current density; epitaxial YSZ; low cost YBCO coated conductors; nonmagnetic substrates; pulsed laser deposition; self field; template; thin oxide layer; trifluoroacetate solution; Conductors; Costs; Critical current; Current density; Optical pulses; Pulsed laser deposition; Radio frequency; Sputtering; Substrates; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
