Crystal defects and critical currents in YBa2Cu3Ox
- 1 September 1990
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 3 (9) , 457-463
- https://doi.org/10.1088/0953-2048/3/9/006
Abstract
Transmission electron microscopy data of crystal defects have been taken in as-sintered and zone-melted YBa2Cu3Ox samples to correlate with the corresponding critical current density properties. The origins and microstructural characteristics of the typical defects, including twin boundaries, grain boundaries, precipitates and dislocations are discussed. A new model is proposed to interpret the effect of twinning on the transport current density. High resolution electron microscopy data of dislocations observed in the zone-melted sample are presented, which indicate the possibility of these dislocations acting as strong pinning centers. Also discussed are the effects of these microstructural changes on transport and magnetization critical current density.Keywords
This publication has 33 references indexed in Scilit:
- Flux pinning and twin boundaries in YBa2Ca3O7-xSuperconductor Science and Technology, 1989
- A New Process with the Promise of High Jc in Oxide SuperconductorsJapanese Journal of Applied Physics, 1989
- Phase transformations inPhysical Review B, 1989
- Isothermal shear transformation in YBa2Cu3O7−δPhysica C: Superconductivity and its Applications, 1988
- Texture processing of YBa2Cu3O7−x by Joule heat zone meltingPhysica C: Superconductivity and its Applications, 1988
- Thermodynammics of oxygen-vacancy ordering in YBa2Cu3OzPhysica C: Superconductivity and its Applications, 1988
- Sintering of YBa2Cu3O7−x compactsMaterials Letters, 1988
- Structure and formation of twins in the orthorhombic YBa2Cu3O7-xPhysica C: Superconductivity and its Applications, 1988
- Domainlike defects observed in the high-temperature superconductor Y-Ba-Cu-OPhysical Review B, 1987
- Twins and oriented domains in the orthorhombic superconductorPhysical Review B, 1987