Observation of anomalous dissipation in dynamics of vortices in Bi2212 in the region of 3D-2D crossover
P. L. Kapitza Institute for Physical Problems, Russian Academy of Science, ul. Kosygina 2, 117334 Moscow, Russia
Accepted: 9 July 1998
Anomalous decrease of the amplitude of Bi 2212 single-crystal vibrations in magnetic field is observed, indicating the existence of strong damping in vortex matter in the region of 3D-2D crossover. This phenomenon occurs in the temperature region 5–35 K and at magnetic fields of 500–1500 Oe where the second-peak effect in magnetization is observed. The results are in qualitative agreement with the Monte Carlo simulation of phase transitions in a vortex system.
PACS: 74.72.Hs – Bi-based cuprates / 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics / 74.25.Nf – Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.)
© EDP Sciences, 1998