Scaling analysis of vortex phase transition in HgBa2Ca2Cu3O8+x superconductors

摘要

Using the vibrating-reed technique, the internal friction (IF) Q(-1) as a function of temperature is measured for sing-phase HgBa2Ca2Cu3O8+x superconductor at low applied magnetic field up to 0.5 T. An IF peak associated with flux motion can be found below T-C. The IF peak becomes higher and shifts towards lower temperature with increasing magnetic field. By using scaling theory we have demonstrated that the internal friction around the transition temperature can be collapsed into a single curve, indicating that the IF peak is originated from a phase transition associated with a vortex glass transition. (c) 2006 Elsevier B.V. All rights reserved.