YBa2Cu3O7- deltasingle-crystal microstructure related to transport critical current density
Authors:
- 1 December 1992
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 5 (12) , 707-711
Abstract
The structure of YBa2Cu3O7- delta crystals has been investigated by means of high-resolution electron microscopy. The cooperative growth of a number of spirals causes the 'interference' of stresses and the formation of microblocks. It is suggested that the screw dislocations inside the growing spirals as well as the edge dislocations on subgrain boundaries are responsible for the high Jc values. Actually, the highest transport critical current density Jc(77 K) and Jc(H) have been measured on these YBa2Cu3O7- delta single crystals.Keywords
This publication has 18 references indexed in Scilit:
- Scanning tunneling microscopic studies of growth spirals in bulk single crystals of superconducting YBa2Cu3O7 and flux pinningApplied Physics Letters, 1992
- Boson localization and pinning by correlated disorder in high-temperature superconductorsPhysical Review Letters, 1992
- Maximum Pinning Energy of Vortices in Anisotropic and Layered SuperconductorsEurophysics Letters, 1992
- Structure and flux flow in thin YBa2Cu3O7filmsSuperconductor Science and Technology, 1992
- Growth Mechanism of Sputtered Films of YBa 2 Cu 3 O 7 Studied by Scanning Tunneling MicroscopyScience, 1991
- Screw dislocations in high-Tc filmsNature, 1991
- Structure and composition of grain boundary dislocation cores and stacking faults in MOCVD-grown YBa2Cu3O7−x thin filmsPhysica C: Superconductivity and its Applications, 1991
- Two classes of growth spirals on single crystals of YBCOJournal of Crystal Growth, 1991
- Effect of Zn, Ga and Ni substitution on the superconducting properties of the electron doped system Nd-Ce-Cu-OPhysica C: Superconductivity and its Applications, 1990
- Surface morphology of flux-grown single crystals of YBa2Cu3O7−δJournal of Crystal Growth, 1988