Control of meandering grain boundary configurations in YBa2Cu3Oy bicrystal thin films based on deposition rate
- 1 October 1996
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 11 (10) , 2440-2449
- https://doi.org/10.1557/jmr.1996.0307
Abstract
Changing the film deposition rate is shown to be one way to influence the meandering configurations of grain boundaries (GB's) formed in YBa2Cu3Oy (YBCO) bicrystal thin films. The magnitude and wavelength of the meander in YBCO films deposited at two different rates have been characterized by transmission electron microscopy (TEM) and statistically quantified. It has been found that the meander becomes more uniform and considerably less rough in films deposited at lower rates compared to that observed in films deposited at higher rates. A mechanism for the formation of the meandering GB is proposed based on heterogeneous nucleation and three-dimensional (3D) island growth together with overgrowth of the YBCO films across the substrate grain boundary. The different island sizes and tendency for overgrowth induced by changing the film deposition rate are believed to play important roles in controlling the meandering GB configuration. The possible effects of meandering configurations on transport properties are discussed.Keywords
This publication has 17 references indexed in Scilit:
- Electrical transport properties of [001] tilt bicrystal grain boundaries in YBa2Cu3O7Applied Physics Letters, 1996
- Meandering grain boundaries in YBa2Cu3Oy bi-crystal thin filmsApplied Physics Letters, 1995
- TEM investigation of grain boundaries in YBa2Cu3O7 thin films grown on SrTiO3 bicrystal substratesPhysica C: Superconductivity and its Applications, 1995
- Grain-boundary structure of thin films of YBa2Cu3O7 and Bi2Sr2CaCu2O8 on bicrystalline substratesPhysica C: Superconductivity and its Applications, 1994
- TEM investigation of YBa2Cu3O7 thin films on SrTiO3 bicrystalsPhysica C: Superconductivity and its Applications, 1994
- A TEM-EELS study of hole concentrations near strongly and weakly coupled grain boundaries in electromagnetically characterized YBa2Cu3O7−δ bicrystalsPhysica C: Superconductivity and its Applications, 1994
- Grain-boundary studies by the coincident-site lattice model and electron-energy-loss spectroscopy of the oxygen K edge in YBa2Cu3O7-δPhilosophical Magazine A, 1993
- Coincidence orientations of crystals in tetragonal systems, with applications to YBa2Cu3O7−δActa crystallographica Section B, Structural science, crystal engineering and materials, 1990
- YBCO and LSCO Films Grown by Off-Axis SputteringPublished by Springer Nature ,1990
- Orientation Dependence of Grain-Boundary Critical Currents inBicrystalsPhysical Review Letters, 1988