Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Inclined substrate deposition (ISD) has the potential for rapid production of high-quality biaxially textured buffer layers, which are important for YBCO-coated conductor applications. We have grown biaxially textured MgO films by ISD at deposition rates of 20-100[angstrom]/sec. Columnar grains with a roof-tile surface structure were observed in the ISD-MgO films. X-ray pole figure analysis revealed that the (002) planes of the ISD-MgO films are tilted at an angle from the substrate normal. A small[phi]-scan full-width at half maximum (FWHM) of[approx]9[sup o] was observed on MgO films deposited at an inclination angle of 55[sup o]. In-plane texture in the ISD MgO films developed in the first 0.5[micro]m from the interface, then stabilized with further increases in film thickness. YBCO films deposited by pulsed laser deposition on ISD-MgO buffered Hastelloy C276 substrates were biaxially aligned with the c-axis parallel to the substrate normal. T[sub c] of 91 K with a sharp transition and transport J[sub c] of 5.5 x 10[sup 5] A/cm[sup 2] at 77 K in self-field were measured on a YBCO film that was 0.46-[micro]m thick, 4-mm wide, 10-mm long.
