INVESTIGADORES
NIEVA Gladys Leonor
artículos
Título:
Vortex softening: Origin of the second peak effect in Bi2Sr2CaCu2O8+delta
Autor/es:
CORREA, V.F.; NIEVA, G.; DE LA CRUZ, F.
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Año: 2001 vol. 87 p. 570031 - 570034
ISSN:
0031-9007
Resumen:
Magnetic hysteresis and transverse ac permeability measurements in Bi2Sr2CaCu2O8+delta allow a comparative analysis of the critical current with the elastic response of vortex structures, in equilibrium with their pinning potential, in the field and temperature region where the second peak is detected. This study provides strong evidence that the second peak has its origin in changes of the elastic equilibrium properties of the vortex structures.
