Loss of interplane correlation in Bi2Sr2CaCu2O8 single crystals

A. ARRIBÉRE; H. PASTORIZA; M. F. GOFFMAN; F. DE LA CRUZ; D. B. MITZI; A. KAPITULNIK

PHYSICAL REVIEW B - SOLID STATE

APS

Año: 1993 vol. 48 p. 7486 - 7491

0556-2805

By means of dc magnetization and ac response of {Bi$_2$Sr$_2$CaCu$_2$O$_{8-\delta}$} single crystals it is shown that the dc irreversibility line the vortex system has no long-rangeorder in the $c$ direction. We find an energy dissipation peak at 7 Hz forinterplane current that takes place at a temperature well bellow theirreversibility line. In this sense, the irreversibility line marks thetemperature where quasi-two dimensional vortices are depinned. Theexperimental data clearly show the different nature of two dissipation peaksin the susceptibility: one related to the interplane currents and the otherassociated with the intraplane ones.