Abstract
Time relaxation of the local persistent current in a Bi2Sr 2CaCu2O8+δ crystal was magneto-optically recorded after suddenly exposing the crystal to a constant magnetic field between 140 and 840 G. A remarkable behavior of the relaxation is revealed for fields below the order-disorder vortex phase transition: The relaxation starts at a slow rate, it then accelerates for a short period of time, after which a slow relaxation rate is resumed. We show that this acceleration marks a local transition of a transient disordered vortex state to a thermodynamically favored quasi-ordered vortex phase. The slow relaxation rates, before and after the transition, reflect ordinary thermally activated flux creep process in the disordered and quasi-ordered vortex phases, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 384-385 |
| Number of pages | 2 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 408-410 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - Aug 2004 |
| Event | Proceedings of the International Conference on Materials - Rio de Janeiro, Brazil Duration: 25 May 2003 → 30 May 2003 |
Bibliographical note
Funding Information:This manuscript is a 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.
Funding
This manuscript is a 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.
| Funders | Funder number |
|---|---|
| German–Israel Foundation | |
| Heinrich Hertz Minerva Center | |
| ISF Center of Excellence Program |
Keywords
- Vortex matter
- Vortex phase transitions
- Vortex transient states