High-$J_{\rm c}$ YBCO Coated Conductors Based on IBAD-TiN Using Stainless Steel Substrates

Ion Beam Assisted Deposition (IBAD) offers the opportunity to prepare highly textured templates for YBa
₂
Cu
₃
O
_7-δ
(YBCO) coated conductors. We investigated a new simplified buffer layer architecture on mechanically polished stainless steel tapes with an amorphous Ta
_0.75
Ni
_0.25
bed layer. Cube textured TiN layers have been prepared by ion beam assisted pulsed laser deposition on these substrates. Consequently, highly textured YBCO layers were obtained with an (103) in-plane alignment of Δφ = 5.9° using an additional SrZrO
₃
buffer layer. A maximum critical current density of about 2.9 MA/cm
²
was measured at 77 K in self-field. The films showed an improved
J
_c
(
H
)-behavior compared to standard YBCO coated conductors.