Time evolution of the induction profile across a Bi2Sr 2CaCu2O8+δ crystal was magneto-optically recorded in two experiments: during ramping the external magnetic field or after a sudden application of the field. The results of these experiments reveal a front-like propagation or retreat of a transient disordered vortex state, respectively. Analysis of the front velocity shows that while the retreat is continuously decelerated, the propagation is accelerated, approaching a constant velocity when the front induction reaches the vortex order-disorder phase transition field Bod. The latter observation suggests a method for determining the value of Bod, eliminating transient state effects.
|Number of pages
|Physica C: Superconductivity and its Applications
|Published - Aug 2004
|Proceedings of the International Conference on Materials - Rio de Janeiro, Brazil
Duration: 25 May 2003 → 30 May 2003
Bibliographical noteFunding Information:
This manuscript is part of B.K. Ph.D. thesis. We acknowledge support from the German–Israel Foundation (GIF). Y.Y. acknowledges support from the ISF Center of Excellence Program, and by the Heinrich Hertz Minerva Center for High Temperature Superconductivity.
- Annealing time
- Transient vortex state
- Vortex phase transitions