INVESTIGADORES
PASTORIZA Hernan
artículos
Título:
Vortex dynamics in Bi2Sr2CaCu2O8+d single crystals with planar defects
Autor/es:
J. A. HERBSOMMER; V. F. CORREA; G. NIEVA; H. PASTORIZA; J. LUZURIAGA
Revista:
SOLID STATE COMMUNICATIONS
Editorial:
Elsevier
Referencias:
Año: 2001 vol. 120 p. 59 - 63
ISSN:
0038-1098
Resumen:
We have studied the effects of c-axis correlated planar defects on the vortex lattice of Bi2Sr2CaCu2O8
single crystals using Bitter decoration, transverse ac permeability and
X-ray measurements. Our results show that the low field low temperature
phase coherent vortex lattice exhibits anisotropic pinning in the
presence of these planar defects. Frequency dependent ac permeability
measurements show that the ordered solidliquid transition is first
order as in samples free of correlated defects. However, the melting
point is detected only when the excitation field is along the defects.