TEM studies on twin boundary in YBa2Cu3O7and YBa2(Cu0.98M0.02)3O7(M = Zn, Al)
- 1 July 1990
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 5 (7) , 1380-1387
- https://doi.org/10.1557/jmr.1990.1380
Abstract
High resolution electron microscopy of the twin boundary layers in YBa2(Cu1−xMx)3O7+δforx= 0 and 0.02 and M = Zn and Al showed that the boundary widths are ∼1 nm for the pure and the Zn substituted YBa2Cu3O7and ∼3 nm for the Al substituted oxide. From two beam contract studies and the high resolution images, it was concluded that the respective lattice plane across the boundary is shifted by (⅓–½)·2d(110)along the boundary. The broadening of the layer by the Al substitution is also thought to be a cause for the reduction of the twin boundary energy, leading to an increased twin density.Keywords
This publication has 16 references indexed in Scilit:
- Formation of coherent twins in YBa2Cu3O7–δ superconductorsJournal of Materials Research, 1989
- Direct observation of the atomic structure of a twin boundary layer in a superconducting Y-Ba-Cu-O ceramicPhilosophical Magazine Letters, 1989
- Microstructure, lattice parameters, and superconductivity of ( for 0≤x≤0.33Physical Review B, 1989
- Vortex Structure in Y and Evidence for Intrinsic PinningPhysical Review Letters, 1989
- Diffusion of oxygen in superconductingceramic oxidesPhysical Review B, 1989
- Irreversible magnetic properties of high Tc superconductorsPhysica C: Superconductivity and its Applications, 1988
- Oxygen vacancy ordering, twinning and Cu substitution in YBa2Cu3O6+xPhysica C: Superconductivity and its Applications, 1988
- Origin of superconductive glassy state and extrinsic critical currents in high-oxidesPhysical Review Letters, 1987
- Estimate of Attainable Critical Current Density in Superconducting YBa2Cu3O7-δJapanese Journal of Applied Physics, 1987
- Ordering of Interstitial Impurities in NiobiumPhysica Status Solidi (b), 1966