Structural and transport properties of biaxially aligned YBa2Cu3O7−x films on polycrystalline Ni-based alloy with ion-beam-modified buffer layers
- 1 August 1993
- journal article
- conference paper
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 74 (3) , 1905-1911
- https://doi.org/10.1063/1.354801
Abstract
Biaxially aligned YBa2Cu3O7−x (YBCO) thin films were produced on polycrystalline Ni‐based alloy, by using biaxial yttria‐stabilized‐zirconia (YSZ) intermediate layers formed by off‐normal ion‐beam‐assisted deposition. Most explicit in‐plane alignment was obtained when the YSZ layer formed with the beam‐incident angle of 55° from substrate normal. Jc‐B characteristics and angular dependence of Jc on the magnetic field were measured. 5.0×105 and 5.5×104 A/cm2 were obtained at 77 K with 0 and 8 T, respectively. The distribution of misorientation angles of in‐plane a and b axes between YBCO grains was evaluated by both x‐ray pole figure measurement and planar observations of transmission electron microscopy. 50% of the grains had the misorientation angles restricted within ±5°. From the image of dislocations, the elastic strains at grain boundaries were estimated to be relaxed with lower misorientation angle. The high‐Jc properties are understood to be obtained by the current paths through low‐angle grain boundaries.This publication has 26 references indexed in Scilit:
- In-plane texturing control of Y-Ba-Cu-O thin films on polycrystalline substrates by ion-beam-modified intermediate buffer layersIEEE Transactions on Applied Superconductivity, 1993
- In-plane aligned YBa2Cu3O7−x thin films deposited on polycrystalline metallic substratesApplied Physics Letters, 1992
- Characterization of Y-Ba-Cu-O thin films and yttria-stabilized zirconia intermediate layers on metal alloys grown by pulsed laser depositionApplied Physics Letters, 1991
- Preparation of aligned high Tc superconducting composite tape by laser deposition process on metallic substrateCryogenics, 1991
- Preparation of YBa2Cu3Oy Superconducting Thin Films on Metallic Substrates by Excimer Laser AblationJapanese Journal of Applied Physics, 1991
- Critical current density enhancement in YBa2Cu3O6.8 films on buffered metallic substratesApplied Physics Letters, 1991
- Superconducting transport properties of grain boundaries in bicrystalsPhysical Review B, 1990
- Anisotropy of the critical current density in epitaxial filmsPhysical Review Letters, 1990
- High-temperature superconductivity in ultrathin films of Y1Ba2Cu3O7−xApplied Physics Letters, 1989
- Orientation Dependence of Grain-Boundary Critical Currents inBicrystalsPhysical Review Letters, 1988