Universality in the current decay and flux creep of Y-Ba-Cu-O high-temperature superconductors
- 1 October 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 42 (10) , 6784-6786
- https://doi.org/10.1103/physrevb.42.6784
Abstract
Recent data on flux creep in a variety of Y-Ba-Cu-O superconductors show a temperature-independent plateau in the magnetization decay Sieq-d lnM(t)/d ln(t), with values clustered in the range S=0.020–0.035. This apparent universality in S, which appears at odds with conventional flux-creep theories, can be explained naturally if one assumes the existence of a truly superconducting ordered phase at low temperatures that has a strongly nonlinear (exponential) I-V characteristic.Keywords
This publication has 16 references indexed in Scilit:
- Defect independence of the irreversibility line in proton-irradiated Y-Ba-Cu-O crystalsPhysical Review Letters, 1990
- Scaling approach to pinning: Charge density waves and giant flux creep in superconductorsPhysical Review Letters, 1990
- Flux creep in the critical state of a high-temperature superconductorPhysical Review Letters, 1990
- Magnetic field and temperature dependence of magnetic flux creep in c-axis-oriented powderPhysical Review B, 1989
- Critical current density and pinning energy of an epitaxial YBa2Cu3O7−δ-filmPhysica C: Superconductivity and its Applications, 1989
- Theory of collective flux creepPhysical Review Letters, 1989
- Optical and electrical enhancement of flux creep in epitaxial filmsPhysical Review Letters, 1989
- Distribution of activation energies for thermally activated flux motion in high-superconductors: An inversion schemePhysical Review Letters, 1989
- Magnetic relaxation and the lower critical fields in a y-ba-cu-o crystalPhysical Review B, 1988
- Flux Creep in Type-II SuperconductorsPhysical Review B, 1969