Vortex softening: Origin of the second peak effect in Bi2Sr2CaCu2O8+delta - art. no. 057003

Authors
Correa, VF Nieva, G de la Cruz, F
Citation
Vf. Correa et al., Vortex softening: Origin of the second peak effect in Bi2Sr2CaCu2O8+delta - art. no. 057003, PHYS REV L, 8705(5), 2001, pp. 7003
Citations number
21
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
8705
Issue
5
Year of publication
2001
Database
ISI
SICI code
0031-9007(20010730)8705:5<7003:VSOOTS>2.0.ZU;2-0
Abstract
Magnetic hysteresis and transverse ac permeability measurements in Bi2Sr2Ca Cu2O8+delta allow a comparative analysis of the critical current with the e lastic response of vortex structures, in equilibrium with their pinning pot ential, in the field and temperature region where the second peak is detect ed. This study provides strong evidence that the second peak has its origin in changes of the elastic equilibrium properties of the vortex structures.