Effects of Magnetic Field and Temperature on the Critical Current Hysteresis in Tl-Ca-Ba-Cu-O Thin Films
- 1 November 1990
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 29 (11A) , L2037-2040
- https://doi.org/10.1143/jjap.29.l2037
Abstract
The behavior of the critical current density of Tl-Ca-Ba-Cu-O superconducting thin films in a cycling magnetic field was investigated. The hysteresis of the transport J c manifested similar features to those found in polycrystalline Y-Ba-Cu-O and granular Nb, Al thin films in zero-field cooling. However, a novel result of the transport J c in field-cooled samples has been observed. The results were attributed to the presence of a saturated trapped magnetic flux in the weaklink network. The effects of temperature on both the trapped flux and the transport J c suggest the existence of various states of the trapped flux in the Tl-based superconducting thin films.Keywords
This publication has 11 references indexed in Scilit:
- Magnetic phase diagrams for high transition temperature superconductorsPhysica C: Superconductivity and its Applications, 1990
- High-field critical current densities in Bi2Sr2Ca1Cu2O8+x/Ag wiresApplied Physics Letters, 1989
- Systematics of transport critical-current-density hysteresis in polycrystalline Y-Ba-Cu-OPhysical Review B, 1989
- Preparation of Tl2Ca2Ba2Cu3Ox Superconducting Thin Films by DC SputteringJapanese Journal of Applied Physics, 1989
- Anisotropy and hysteresis of transport critical currents in high temperature Ln-Y-Ba-Cu-O superconductorsCryogenics, 1989
- Transport hysteresis of the oxide superconductor in applied fieldsPhysical Review B, 1989
- Physical Properties of the New SuperconductorsPublished by Elsevier ,1989
- Evidence from Mechanical Measurements for Flux-Lattice Melting in Single-Crystal Y andPhysical Review Letters, 1988
- Relation of critical current irreversibility to trapped flux and microstructure in polycrystalline YBa2Cu3O7Cryogenics, 1988
- Josephson-junction model of critical current in granular superconductorsPhysical Review B, 1988