Dependence of transport critical current density on sample size for ceramic RBa2Cu3O7−x (R≡Y, Ho, Gd)
- 1 December 1989
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 66 (11), 5510-5513
- https://doi.org/10.1063/1.343703
Abstract
Measurements of the transport critical current density Jc were carried out on sintered and partially melted samples of YBa2Cu3O7−x , YBa2Cu3O7−x +Ag, HoBa2Cu3O7−x, and GdBa2Cu3O7−x using a four‐probe method and a contactless magnetic induction method. Results obtained by the two methods were in agreement. A pronounced dependence of Jc on sample cross‐sectional area was observed for all samples: Jc increased with decreasing cross‐sectional area. Values of Jc ranging from about 30 to 800 A/cm2 were measured depending on the preparation method and sample geometry. It is concluded that in view of the cross‐sectional area dependence, comparison of Jc for different preparations should always be made for samples of similar geometry.Keywords
This publication has 8 references indexed in Scilit:
- Critical current limitations in ceramic oxide superconductorsCryogenics, 1989
- New critical-state model for critical currents in ceramic high-superconductorsPhysical Review B, 1988
- Liquidus relations in Y–Ba–Cu oxidesJournal of Materials Research, 1988
- Critical and supercritical current measurements by a magnetic induction methodCryogenics, 1988
- High critical currents in Y-Ba-Cu-O superconductorsApplied Physics Letters, 1988
- Evidence for homogeneous superconducting grains in high-oxidesPhysical Review B, 1988
- Experiments concerning the connective nature of superconductivity in YBa2Cu3O7Journal of Applied Physics, 1987
- TRANSPORT CRITICAL CURRENT IN BULK SINTERED Y1Ba2Cu3OxAND POSSIBILITIES FOR ITS ENHANCEMENT*Advanced Ceramic Materials, 1987