Growth and properties of YBCO-coated conductors on biaxially textured MgO filmsprepared by inclined substrate deposition

Abstract

YBa2Cu3O7−δ (YBCO) filmswere fabricated on SrRuO3 (SRO)-buffered MgO templates grown on Hastelloy C276 metallic substrates, on which theMgO layers had been deposited by inclined substrate deposition (ISD) using electron beamevaporation. YBCO and SRO films were deposited by pulsed laser deposition (PLD).ISD-MgO substrates fabricated with two different substrate inclination angles(α = 35° and 55°) were used to grow YBCO films. High transport critical current density,Jc = 1.4 × 106 A cm−2, has been measured at 77 K in self-field for YBCO film grown on ISD-MgO withα = 35°, whereas YBCO film grown on ISD-MgO withα = 55° had alower Jc = 0.5 × 106 A cm−2. X-ray pole figure patterns revealed a cube-on-cube orientationrelationship among YBCO, SRO, and ISD-MgO films, with thec-axis of the YBCO filmbeing tilted. X-ray ω and ϕ-scans revealed good in-plane and out-of-plane textures of YBCO film grown on ISD-MgOsubstrate. The YBCO film grown on ISD-MgO with substrate inclination angleα = 35° had a YBCO(005)ϕ-scan full widthat half maximum (FWHM) = 5.8° and a YBCO(007) ω-scan FWHM = 2.8°, whileYBCO film with α = 55° had YBCO(005) ϕ-scan FWHM = 5.4° andYBCO(007) ω-scan FWHM = 2.6°.