Abstract
In order to investigate the relationship between the flux pinning and dimensionality, the critical current density Jc for YBa2Cu3O7 films was measured as a function of temperature, field and tilt angle between field and c-axis. The kink anomaly in the temperature dependence of Jc for B⊥c was observed as the dimensional crossover from 3D extrinsic pinning to 2D intrinsic pinning. The irreversibility field Bi for B//c was measured in fields up to 23T and estimated to be 90T at 30K using the scaling law of the pinning force densities. The enhancement of Bi from a power law (1-T/Tc)n with n≃1.5 for B//c was observed below 40K. This suggests the formation of the 2-dimensional pancake vortex in YBa2Cu3O7.
Original language | English |
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Pages (from-to) | 333-337 |
Number of pages | 5 |
Journal | Science Reports of the Rerearch Institutes Tohoku University Series A-Physics |
Volume | 42 |
Issue number | 2 |
Publication status | Published - 1996 May 1 |
Keywords
- Critical current density
- Dimensional crossover
- Intrinsic pinning
- Irreversibility field
- YBaCuO film
ASJC Scopus subject areas
- Condensed Matter Physics
- Metals and Alloys